There's about a hundred rumors running around the various sites right now ranging from a simple refurb of the ride, to the simpsons, to Fast and the Furious, and even to the Transformers. Personally I've decided just to wait until there's more evidence. So far all we've really heard is mainly just a bunch of uncorroborated running of the mouth. The only thing we do know is that it will close at some point. Whether it will open back up as BTTF, as something else, or not at all is still yet to be seen.