Sent to infiltrate and subdue a tribe of alien natives in exchange for the use of his legs, a paraplegic marine questions his orders and must fight for the alien tribe’s survival in order to truly belong.

Story of triumph of good over bad when a paraplegic marine is sent to infiltrate a race of humanoid aliens on their planet, and he finds a shift of allegiance

I really like this logline. It clearly describes the goal, the conflict and the protagonist.
I haven't seen the movie yet, so I might be wrong but the "in order to truly belong" bit seems a little vague to me.