Personally, It will last longer than BttF. If you ponder for a microscopic amount of time, The Simpsons will be ending in a few years, and after that, a plethora of Simpsons fans will be trekking to Universal. Secondly, it will probably be the only Simpsons experience that hasn't been illustrated on TV. It will technically be the only "New" Simpsons experience left, another reason for it to last longer than Back to the Future.