Man of Action is a group consisting of Duncan Rouleau, Joe Casey, Joe Kelly, Steven T. Seagle. They are the creators of the Ben 10 series. They've also created Generator Rex as well as written episodes of Ultimate Spiderman and Avengers Assemble . Man of Action also has a website about their blogs and shows. Their name pops up at the beginning of all the Ben 10 episodes they directed. They also made four movies and video games.
For Ben 10: Alien Force and Ben 10: Ultimate Alien, Man of Action were no longer involved. Ben 10 was taken over by new management, i.e., Dwayne McDuffie and Glen Murakami.
Man of Action will return as executive producers for the Ben 10 reboot.