This strangely seems more and more likely by the day. USH will also seemingly get a longer Hogwarts Express experience. I wonder how they'll deal with the obvious elevation changes. Diagon will HAVE to be a tad smaller than the Orlando version, since Gringotts has to come. Which will be weird, placed almost right next to Transformers. This is, of course, if all the rumors are true. (probably)
Whatever. I hope Universal uses the time building it to gut Mummy and install a Nintendo attraction. That'd be sweet.