I’d like to see a coaster, but maybe along the lines of Rock’n’Rollercoaster (indoor, launched, looping, with a soundtrack component). That could fit there, as it sounds like there’s little chance of a coaster that size going in for Nintendo or anywhere else, especially with noise and height restrictions. That might be your best shot. Maybe themed to music (like Rip Ride Rocket) or even Sci-fi (it’s adjacent to Transformers and JP, which would flow a little bit better than SLOP on the lower lot between those two).
Not saying you need ten coasters to compete with Six Flags/Knotts, but one squeezed in after a bunch of family additions (Dreamworks Theater, SLOP, Nintendo) wouldn’t hurt the park, either. Especially if Mummy is axed.