Just got back from seeing it and...Wow. Not what I was expecting. In hindsight I should have expected this to be what it was: A Speilburg film. And I say this in a good way. The whole concept of all these pop culture references as a world is just that: It's all in the background of what is a somewhat cliche'd, and yet at the same pretty refreshing and poignant story. I don't think I processed more than a handful of cameos (No Cloud that I could pick out, though I swear I caught a glimps of a VII styled chocobo and a moogle on it's back).
The movie basically pulls A Cabin In the Woods, where everything is too fast and too much for you to really process it. I'm sure someone will have a field day when it goes out on DVD and can pin point every single cameo. But the film really does have a lot more going for it than just being a pop culture milkshake. The characters are great, especially giving the main female character a hell of a lot of agency right up to the end. Props for a subtle but unignorable LGBT rep, and just a lot of fun twists and turns.