As would I. Personally, he'd make a great Punisher-type anti-hero. Who knows, maybe Proto and Castle can team up to become a new unstoppable vigilante duo!
Rambo. Especially if he's pitted against the same strutting, cocky Predator from P2. That hunter's arrogance and lack of respect towards his prey lead to his downfall, whereas Rambo's discipline, resourcefulness, and Green Beret training will ultimately win the day