@Alicia Implied a while ago that F&F was being considered for early retirement. If that's right, good riddance. In addition, HRRR according to
@Nick is reaching the end of it's service life and considering how those soundstages below HRRR more than likely aren't going anywhere, the most logical option IMO would be to put some sort of other coaster in that spot themed to F&F. That location also is pretty much the only option for a thrill Coaster in USF as well if they don't want to concede that segment of ride to IOA and EU.