I've only gotten a few responses from people actively looking to participate, so tell your artistic friends who are looking for a chance to get their art in a real movie - even if they don't know who these guys are.
Below, I've summarized what would be good jumping off points for some of the character specific imagery.
Isai (dominant color - orange): With his devilish goatee and wild hair, the young monkish Isai appears serene and content in his natural power - a hint of which can be seen emanating from his piercing gaze. Neutral stance. (Alternate pose - Isai belly laughing)
Ken (dominant color - red): The thin and confident Ken crosses his arms and smiles. His upturned chin displays contempt for your attempts to defeat him. (Alternate pose - Ken's death stare)
Azen (dominant color - blue): The shorter Azen stands with shoulders slouched and head bowed, gaze towards the ground. His power is great, but clearly a burden to himself. He is a warrior conflicted. (Alternate pose - Azen smiles the most open loving smile)
PC Chris (dominant color - black): One foot on a skateboard, one hand thrown behind his head, PC Chris is the essence of cool. He plays it loose and all for fun with his cigarette and leather jacket. (Alternate pose - PC Chris gives the "puffed up" face)
Mew2King (dominant color - green): Mind powers blazing, M2K focuses his gaze to nowhere in particular. A hand under his chin, the bespeckled scientist of Melee conjures up new tactics. (Alternate pose - M2K laughing awkwardly, hand behind head; trying his best to fit in)
Korean DJ (dominant color - yellow): In perfect "power up" stance ala dbz, KDJ's hair flutters as he raises his anger and aggression into a dangerous focus. (Alternate pose - KDJ contemplates a sad past)
Mango (dominant color - none?): The classic "drunken monk", Mango (sporting a black wife-beater) laughs big with head skyward, enjoying the competition as only a master can. (Alternate pose - Mango gets serious)
That'd be where I'd start. Maybe I should post this somewhere where artistic types will see this. There isn't a thread for melee artists, is there?
PS - good **** vanir. Can't wait to see em. :D