TBH, the only way I can see Godzilla is if it's a expanded version of the SDCC Godzilla Experience that was at San Diego in 2013. And that the attraction would play a card between that and Nemesis: Sub Terra from Alton Towers.
Edit: a good idea would be some sort of Tokyo area with Sanrio and Dragonball or even something like Yokai Watch to add diversity with Godzilla.
As far as T2s replacement goes, I don't expect anything major to change, and that's unfortunate.