Fred is teh evil.

So, after listening to the latest Butcher Block we all know that Fred is aware of the title of the 5th Alera book. The title apparently contains massive spoilers because he won't share it us.

Possible spoilers ahead.

Could it be because the 5th title is Princeps Fury?

The last few titles have given us an insight into Tavi's current positions

Academ's Fury he was of course an Academ at the academy.
Cursor's Fury he is already a Cursor.
Captain's fury I'm assuming he will continue to be the captain of the First Aleran.

The next logical step in the story line is for him to take up his rightful position as Princeps, so why not Princeps Fury?