What land does TDL or DisneySea have left to expand in though?
All TDL really has left for its expansion space will cause a war (RoA) and DisneySea has the space near Indy, carpark by Toy Story Mania and Aquatopia.
Outside of (I guess) ROA and the carpark near TSM (as we already know Aquatopia is earmarked for something else, I personally think the area near TSM is going to be for a Spider-Man project): the last obvious space for Zootopia feels like a retheme for Splash Mountain and a takeover of Critter Country.
They can't sell merch of the brers anymore, but they can sell Nick and Judy.
They can't play the songs anymore from Splash, but they can play "Try Everything" and "Zoo" I guess.
And OLC actually puts effort into their stuff so I'd be willing to argue a Splash retheme by them would be more likely to be a success than what's happened in Cali/FL.
When Splash Mountain goes, I don't expect it to happen til the following things happen at TDR:
• Space Mountain and Wreck it Ralph are open
• Adventureland and Port Discovery get their makeovers
But I think it'll get rethemed along with their ROA going, as much as it'd suck, this is the Disney park that wants to actively rip out their Jungle Cruise.