I don't think it's likely at all, but it's possible that his plans changed. I haven't read the Luccio Kemmler short yet, so I don't know if it reveals anything more about him, but I have no clue what his original goal was. Why start a World War? Was it just power he was after, or something else? If he had a different goal beyond ascending to godhood—like he thought he might need the power to do something specific—maybe he found a different way to accomplish that goal (such as coaxing Starborn to be his minions), and that necessitated going into hiding—which also requires avoiding black magic when possible to avoid detection.

Again, likely? Nope. Almost absolutely certain this isn't the case. Slim, minuscule, infinitesimal chance? Yeah.

Seems a reasonable assumption. He had all the information about him, the same that the White Council had, which I'm positive includes a portrait, or a physical description. This is assuming that locking away Big Bad Bob also locked away his direct recollection of what Kemmler looked like.

Then again, it's possible that Corpsetaker learned her little trick from Big Kemmler, and he switched with Justin when it became clear he was going to lose to the White Council. The rest of his life was an act—and it certainly looks like Justin went bad after his encounter with him.

  So, you don't want to talk about the interior of the Earth between the core and the crust, a fragile mesh covering around a gas jet, or the upper part of bird of prey's back?

Authors are gonna write when they are gonna write.

But dude IS spot on about this site.  There is not a lot of activity going down here.

Slightly unrelated topic, but not really.  Jim was scheduled at a writer's conference in Colorado starting on April 27th.  I just checked the conference website and Jim isn't listed as attending.  That may be disappointing for aspiring writers who are also fans of Jim's work, but it suggests he his concentrating on finishing Peace Talks which I think we can all agree is a good thing.

I do miss those times when Jim would go on twitter and announce "I just loaded (fill in the blank) and I'm at 75% of my expected word count."  Plus, those times when he would announce "I just finished up the final battle and now have only to write the denouement chapter," let us know he was getting close to finishing.  Also, I agree with the OP on one subject.  Unless it would be super spoilery, I'd love to see Jim do a reading of the first two or three chapters several months before publication.  He hasn't done that in ages.

The reason why I ask this is because in a thread where I discussed that Marcone was descended from Harry and Murphy, and that his origin was in time traveling etc, someone mentioned a similarity between what I was asserting and the Xmen character Cable.  So I did research into Cable and his name was Nathan Summers, with an alias of Nathan Winters.
https://en.wikipedia.org/wiki/Cable_(comics)
Notable aliases   
Nathan Winters, Nathan Dayspring, Askani'son, Soldier X, Chosen One, Traveler

So, I was trying to link Marcone with this Cable guy who looks like this...
https://en.wikipedia.org/wiki/Cable_(comics)

I took the impression that the Section on Marcone was all about him, so I saw Nathan in the section and wondered if it was Marcone's name.  It should be noted that Priscellie's herself in Reddit disputed this and argued that it was in fact Hendrick's name and not Marcone's.  Now, if there is no in book, direct woj from Jim via video, reddit, twitter, I'm going to propose that there exists a possibility that Marcone's first name is Nathan, that it slipped out, that someone wasn't suppose to let it slip out, and there is a cover up to that fact.