The unknown in this question is, "Where will Harry be when Ebenezer dies?"  If Harry just get's word of Ebenezer's death or if Harry is present, but so are a number of powerful members of the White Council, then in all likelihood the Council decides and either Captain Luccio or Warden Ramirez gets the Blackstaff.  The only reason I don't think it will be Luccio is because her fighting ability has been diminished.  The Blackstaff would make her uber-powerful, but it's a weapon that should only be used with great discretion and only at times when nothing else is appropriate.  So, I could see Ramirez getting the job in an attempt by the Senior Council to counter-balance Harry.

On the other hand, if Harry and Ebenezer are together when Eb meets his end, but no one else is around, that changes things.  I could see Harry picking up the staff and wouldn't you know it, Mab shows up to give Harry the most dangerous mission he has ever faced.  A task that even the Eye of Ethniu would be of little use in completing.  Now Harry won't want the Blackstaff, so I could see Harry getting summoned by Mother Winter and getting told that either he has to use the Blackstaff to complete his mission or return it to it's original owner, Mother Winter herself.  It doesn't have to be exactly that scenario, but it could be something close to that. 

If Harry does pick up the Blackstaff, my prediction is that it will be a one and done affair.  As Harry is no longer a member of the White Council, he couldn't act as Blackstaff Dresden of the Council, though it would give the Council a new level of deniability if Harry did their dirty work for them.  However, most of the Senior Council would never trust Harry with that job.  After using the Blackstaff once, my guess is that Harry would return it to the Council rather than Mother Winter.  Then again, maybe not, I don't know.  It's just a feeling I have.       

I'm not entirely sure about that.

• The White Council could boycott because Harry is persona-non-grata (and his two closest relationships are seriously pissed about him being friendly with Lara).
• The Svartalves are likely still not pleased about the assassination attempt and subsequent kidnapping of the attacker, by the two people getting married no less.
• The ghouls don't like Harry any more than he likes them.
• The Denarians seem to be out after their SmF betrayal, and they wouldn't show anyway after Harry's involvement with Deirdre's death and Nico's loss of standing.
• I don't see the Erlking caring for such things. I imagine he shows up only for what he has to.
• Same for Ferrovax.
  
• Marcone will show up even though he wouldn't want to. He can't let an event like that happen in his town without being a part. Especially if he wants to make sure he doesn't start getting cut out now that Mab knows about the coin.

So I think it'll be Winter/White/Summer Courts, plus River and maybe Vadderung if he's got nothing better to do, and Marcone out of necessity.

As I see it, this wedding; meaning the alliance between between Winter and the White Court, is Mab's idea and therefore it would be her party, even if Molly or Lea handled the planning in conjunction with input from Lara Raith.  Therefore, it would be Mab who would decide which major powers would be on the invite list.  So, the question to ask is not whether the White Council, Ghouls or Swartalves would want to attend, but whether Mab would invite them to send a representative. 

Should Mab decide to make a very public statement by inviting all the major powers in the anti-Fomor alliance to send representatives to the wedding; and I think there is a fair possibility this would occur, would the White Council, Ghouls or Swartalves decide to snub Mab's invitation?  I don't think so. 

One possible problem I foresee with this hypothetical wedding is this gathering might look a little like a combination of Bianca's Ball, Harry's birthday party in Cold Days and the get together of the major powers near the beginning of Peace Talks.  I would expect lots of creepy manipulation and everyone would stare daggers at each other, but haven't we already seen that kind of thing before, and fairly recently?  Maybe we could get what I wanted to see happen in Peace Talks.  Some major player from one of the supernatural nations is murdered and Harry has to solve the crime to save the alliance and his own skin.  It would be nice to see Harry get to be a detective again.

Jim made a post on July 25th showing pictures of his cat and dog.  There wasn't any message, it was just a couple of cute pics.  I guess Jim was just letting the world know he's OK and is still doing his thing.

I like the second idea, the healing one.  It seems like something LTW would do.  However, if LTW was fighting a Naagloshii, perhaps Eb could use his curse to prevent the thing from shapeshifting, making it much more killable.

Been a hard week so I am a bit confused, if Eb tries an entrophy curse on Lara and it is successful.  Then she is dead right?  So what's to warn Harry about?  I can see Eb admitting to it, and telling Harry about it because it would put him in a tough spot.

You are conflating two separate ideas into one idea.  They are separate and distinct.  The first is about Ebenezer reacting to White Council (Arthur Langtry and company) intentions to get rid of Harry.  The second is Ebenezer's personal vendetta against the White Court and his desire to save Harry from the White's and what Eb sees as Harry's naiveté in regard to how evil the White Court is.  These ideas are only indirectly related because Ebenezer might believe that by killing Lara Raith he would (temporarily) be removing some of the fear of what Harry is becoming and the pressure to remove him.  I don't have much more to say about the first idea, it's fairly self explanatory, so everything else is about the second idea. 

I have long speculated in other threads; going back to the original forum, that at some point Lara is going to demonstrate that she has learned her father's secrets and at that point she will no longer need to maintain the fiction that Lord Raith is still the effective leader of the White Court.  My original hypothesis had Lord Raith dying, which would lead to some type of White Court meeting or council to discuss who should lead the Court.  This would prompt Lara to use the "kiss of death" technique her father was said to have been able to use to silence critics and would be challengers to her rule. 

I now see a possibility that Ebenezer will try to kill Lara only to discover that she has become immune to magic.  As of Peace Talks and Battle Ground that isn't true.  By the end of the next Twelve Months, maybe things will have changed.  Lara now knows that Marcone is a denarian.  She might not know which of the Fallen Marcone has made his business partner, but she can guess that Marcone now has some magic ability of his own to wield.  Lara is being forced into a political marriage with Harry.  She has long wanted to control Harry, but knows how dangerous Harry is and how surprisingly cunning he can sometimes be.  If Lara knows of, or learns of her father's immunity to magic, she will almost certainly want to acquire the same immunity herself.

So, if Ebenezer makes an attempt to kill Lara and fails, he would probably want to warn Harry about her immunity to mortal magic.  However, it would lead to the somewhat embarrassing confession that Ebenezer was; once again, attempting to interfere in Harry's life; for his own good, of course.       

Here's what I would think about.  I could see Jim making Harry a signatory to the accords, a recognized power in his own right.  The thing is, Jim wants to keep Harry as a medium sized fish, not a big fish.  So, if Harry picks up this type of power, it has to be balanced; probably by added responsibility to weigh him down, and of course, added danger.  Being one person, Harry doesn't have Valkyries, Hugin and Muninn  or Einherjar he can call on to do his dirty work.  Harry only has Toot and company he can order around.  I would wonder how this might gimp him.   

I don't think Marcone ever wanted to marry Mab.. Nor do I think that she'd think he would add enough to her own power for her to marry him.

Yea, that's pretty much where I'm at.  Plus, the I don't think the Winter Lady can get married and consummate the marriage before her new husband would become really, really killed.