After reading more and more of the comments posted here, im just going to say it.
Some of you people have absolutely no imagination. You must have to be the most stuck up, tight arsed self-loathing prick to be so arrogant as to liken the enjoyment of this to that of a child watching a cartoon.
Just enjoy it. I don't see whats wrong in suspending your disbelief and being whisked away to wonderful places (obviously not in a hallucinagenic sense). Just chillax, have a beer and enjoy yourself. No one, though they won't admit this, can say that they enjoy complaining about it being cartoony more than attempting to engage with the film and just have fun.
Of course almost all the comments become null when we realise this is a trailer. Traiiilleeerrrrrrrrr. Although if you've seen it in the special i-max showings, fair enough.