My first choice would have to be miss Jean Grey from X-Men the last stand. Why? Jean Grey goes through a huge change becoming the most powerful mutant ever, The Phoenix.
My second choice would be Vin Diesel. Vin Diesel is The bad ass if all bad asses cause it doesn't matter what he stars in weather in a movie or real life he is always ready to bring it to the street.
My final choice is Kyle from Kyle XY. Kyle is a genetic enhanced human from birth. He is super inelegant and can compromise to put together any solution to get out of any and all situations..
Teaming up with me (Christopher Reeves). The challenges and devastation that lies ahead will have no chance of getting past such a force to be reckoned with...