The Punisher is one of the most challenging comic book heroes to try to adapt on screen. In a lot of ways, he's just a guy. Sure, he's a guy with enough firepower to occupy a small country, legendary combat skills, and more baggage than a 747, but he's still different from most comic book heroes. He doesn't have superpowers or a brightly colored spandex suit to fit into. He's not particularly wealthy or intelligent in the Reed Richards sense, nor is he mystical in the Stephen Strange sense. Frank Castle is just someone out to punish evildoers and maybe, while he's at it, get revenge for his murdered family too.