Flight of Passage is still number 1 but Cosmic Rewind is a close second. Given that it's themed to be an "Other World Showcase" exhibit for Xandar before things go wrong, I think the themeing is well done. The queue and pre-show is supposed to be about Xandar - the Guardians only enter the picture to help when things go wrong. And after the reshow when you're going to the vehicles, it's supposed to look like you're backstage because in the ride storyline you are.