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Ok, let's see if I have this crap straight.  A man who is paralyzed from the waste down crawls into some sort of pod-like device and through a miracle of modern science can become (through dreaming, I think) a very tall fully-ambulatory blue being who joins a band of similar blue beings (even falling in love with a girl blue).  The blue gang lives on a very strange planet where mountains float in the sky, unattached to anything below, and Tinkerbelle gods float around and grant prayers.  The main weapons of the blues (ya gotta have weapons, it's a movie). are bows and arrows.  Mankind has evolved so much in this movie that science has progressed to the point where it is possible for this transition to blue being to happen.  But mankind is still kind of primitive, attacking other beings with all sorts of super weaponry to gain control of their assets (actually I do not find this part all that far-fetched).  But the blues prevail, led, of course, by their new blue convert.  Thank Tinkerbelle.  I am wondering though, if science has progressed all this far, far enough to allow someone to crawl into a pod and become tall, blue, and handsome, why was this guy still in a wheelchair to begin with?  Why haven't they been able to just fix his paralysis?  Of course, had that happened, we wouldn't have had this wonderful movie, we wouldn't have bought all that popcorn and snacks. 
Personally, I preferred "Whatever Happened To Baby Jane."  The wheelchair was just a better actor back then.  Oh well, icky sticky doo doo (no, I'm not speaking in tongues, that's bluespeak for  "See ya later").