I'm kind of curious if Nerva is going to play into 6.0 somehow or if Fandaniel will have finished using him by the time 5.5 is over.

There is a distinctly Garlean-looking dungeon that was previewed so I feel like they're going to be a thorn in our side at some point, though whether they're coherent or just tempered thralls to whatever force is powering the towers is anyone's guess.