I saw this trailer today for the first time over on the Bigdumbobject site.
While it looks moderately eye-popping, and it's interesting to see Lionsgate do a cartoon, and an SF cartoon at that...a lot about this trailer made my eyes roll.
I've not seen the movie, but let's make some predictions, shall we?:
1) This is an ecological fable.
2) The aliens are a politically correct hybridization of American Indians and Hippies, which is the kind of thing hippies will love and Indians will hate for good reason.