With the latest speculation on the forms about the probability of Wicked coming to the parks, the only logical place it would seemingly go now based on the current pipeline of new attractions planned for the parks (F&F coaster, LC replacement, and Potter phase 2) would be USF. And with the Simpsons contract lasping in 2028, Springfield would likely be the place it would hypothetically go.
But a bigger question is what scale would Universal want with the IP? Would they keep it contained to just Springfield or would they want to go all out and maybe even expand outwards to take out MIB? Yes, I know this might be controversial, but Universal fully owns Wicked. It's a hot thing and they have plans to further expand the franchise. Meanwhile MIB is licensed out with Sony and at this point in time is a dead IP.