I'm not thinking too literal, I'm thinking of the space available & the themes each provide. Hollywood Drift is most likely adopting the Duff Gardens area next to it (along with ice cream, hot dogs, pizza & tacos most likely). As great as the new coaster is, the location makes it a singular identity like Waterworld.
That leaves Fast Food Blvd & Simpsons ride for something new. Celestial Park would be the only logical EU "land" to get inspired by & possibly give us back a show venue where Simpsons is located
Monsters, Dragons & Potter would be an awkward thing to shove into the limited space. However a show from any of those lands would fit perfectly fine. We lost two show venues for the coaster, so losing the ride for a singular show venue wouldn't be completely out of the question.
I'm thinking of the bigger picture of the massive overhaul they did to the park a few years ago. Might as well carry it over to Springfield with more landscaping to give the Upper Lot more cohesion.