Of course they put it right there for a reason! GMR will no longer exist the SECOND MGM ends its deal with Disney. There is just too much MGM stuff inside. That's when they will start on the new GMR. Who knows what it will be. I don't think Disney knows at this point. But they want something major. Maybe this is where they are planning to do the Disney version of Spider-man that they want so desperately.
I just don't see the hat being the "permanent" icon for Disney. Once the GMR gets the new ride inside, that thing has to move. Putting it near Fantasmic would be cool, but they would never block ToT with it. Maybe they should block that hideous RnRC! LOL
Besides, if the hat disappears when the new GMR opens, then they can sell all of their Sorceror Hat merchandise like mad!