If you completely dominate the remaining space in Forbidden Valley (which would likely ruin it) and demolish most of the buildings, this is the realistic space left below. For comparison, that's a similar size footprint to the Smiler, which is built mostly at the bottom of a hill, in a pit and known for it's tight and compact layout. In this space, you'd need to do considerable excavation due to how high up it is (Forbidden Valley slopes down from here, this is it's highest point), find space for walkways (only some of which can safely go underneath a coaster, or at great cost, above it), a considerable length queue line, a maintenance shed, a station, a gift shop, supporting attractions and some sort of retail and food & bev provision (which could go in the area by Galactica).
It's possible of course, but they'd be extremely restricted with layout, height and cost. To put a coaster here it'd likely be small, a shuttle or very costly. Of course they could use the area at the bottom by Galactica and Nemesis break run but that's even more restricted layout wise.
I'm not saying it's not feasible and that something decent can't be built there. I also wouldn't rule it out. I just don't know why cramming 3 coasters into this area seems to be such a popular choice for speculation when there are far more suitable locations around the park.