IIRC, there were rumors about Supercharged being shuttered after the coaster comes online, but those rumors went dormant. If it were shuttered, I foresee some sort of overlay until falls lake can be redeveloped for USH park expansion.
With the new hotel coming online at USH, Universal needs to increase the hours of USH, and the way to do that will be to massively expand the park. Falls Lake will be next in line after SS 16-24 and Mummy are torn out for that long speculated on lower lot expansion.