One ride =/= your identity. Jaws was far from the most popular ride at UOR. People didn't come to USF to ride Jaws. They came to ride Rockit, or Mummy, or Simpsons. Jaws was a nice afterthought ride. It's loss, for the most part, is only a big deal to a small, select group of fans.
And besides, they're losing one Universal ride, and gaining another in Despicable Me. Not to mention a night show and parade.
Because an original ride would never bring in the money that Potter will. never.
And speaking of that money, we wouldn't be getting that spiffy new night show or parade without the Potter money. We wouldn't have gotten all the refurbs in IoA without it. So honestly, people really need to think about the whole situation.
As it's been said, this will be going in the Jaws area. And even if it was going right next to the original area, WDW has a whole land of dark rides right next to each other. It's called Fantasyland.