Given it seems HHN will be making camp there with an overlay seemingly inbound this year; DreamWorks Theater should be safe (and I agree with what
@chris.g is saying in that TWDA should probably be better suited to become a proper HHN venue.)
What I would wonder, is actually on Parisian. It has been rumored in the past that they might look to get rid of that section in favor of an Illumination based replacement; one that could complete what they currently have with Despicable Me Minion Mayhem, Secret Life of Pets: Off The Leash, and Silly Swirl/Super Silly Fun Land.
It'd be big enough too for a two floor attraction if they wanted to maximize things like they did with Pets.