Gen13 was one of those initial Image comics that was basically a knock off of the X-Men, and fit into the Wildstorm Universe as a sort of New Mutants analogue. There was an animated movie that never got released in the US, but no movie plans have ever been pushed forward. This weekend I was asked who I would cast if such a movie was made. This taxed my internal actor and comic database and still I failed to cast one of the team, because there is just no actor working today who is Asian, with an American accent, who is as wide as a refridgerator and 5'4'. It just doesn't happen.
Alex Pettyfer as Burnout. You've seen him in "I Am Number Four" and possibly been dragged to see him in women friendly movies like Beastly and Magic Mike.
Deborah Ann Woll is currently on True Blood playing Jessica, who was once a mousy little home school kid and now is a voracious, literal, man-eater. Going from nerd to amazon should be easy for her.
There are not that many pictures of Gen13 on the net that are not ecchi, but here is a decent one of Roxanne Spaulding, AKA Freefall, in her school clothes. Freefall was gothy, punky, spunky, and cool. She was the girl your mom worried about you dating, but was actually kind of a sweetheart. Victoria Justice could break a little from her ultra nice girl look and give this a try.