The plans aren't 100% clear. I know from what I've seen the current restaurant and where the now removed Armageddon building once was are part of the official land. The current stunt show will remain a stunt show apparently but undoubtedly will be rethemed. The theatres are probably the last things that they'll change if they're doing them. I suspect whether they end up being Marvel or not they'll still be refurbished and get new shows.