You certainly could fit a (small) Raptor into the X pyramid...in theory.
In reality, ripping out the track, and then building a new coaster inside the building would be wildly impractical. So I wouldn't expect to see something like that.
Of course, they could just rip out the whole pyramid, and along with the Slammer site, that opens up a big plot for a new coaster. But then ripping out the pyramid has a whole host of knock on effects, and would itself be expensive.