100%. SLoP or at least a dark ride with a similar layout could easily fit in Villain Con. IDK why they didn't go with a proper Minions dark ride.
The original plans for SLoP did call for a trackless dark ride where the entire queue, eatery, and exit gift shop were on the first floor with the entire ride on the second. This would be ideal for a Ghostbusters dark ride. They could put something like that where Fallon is and/or something similar where that empty building is behind the NY Library facade. They would probably want to keep that building empty for events and for pres for HHN so I guess just the Fallon structure.
Beyond that....shoot that entire South side of the park is basically gonna stay the way it is. Not much they can do. Other than that, you have FFL, The backstage area, Supercharged, Springfield and Dream Works Land to work with. That entire North side of the park is where all of the major change will be at. Even then they will probably want to tread carefully with the backstage space to not interfere much with HHN.
Man, Men In Black is kind of in the way for park expansion. But that's my favorite shooter lol