Is that Yondu fresh from taking flying lessons from Voldemort?
I guess it's his arrow thing, which he's using to fly, but it looks a bit weird & makes me think of him using a magic wand.
The rest of the poster is awesome, it's just that Yondu seems to be the odd man out. (And I assume it's Yondu, since he's blue. However, since he's got more of a Mohawk, I can't be entirely certain.)