I'm probably in the minority here, but I don't think USF needs another Potter attraction. After Velocicoaster, IOA will still rein supreme as the thrill park for the UOR, and EU seems to be the crown jewel for theming, but where does that leave USF? I think it would be cool if Universal makes USF a park that pays tributes to all their old classics, keep E.T. (duh) but add a Back to the Future coaster, make a new version of Jaws, etc.
Or at the very least, make an attempt to build their own version of GMR, I think USF needs to play into Universal's history