Board Thread:Questions and Answers/@comment-24174049-20131118231337/@comment-4432309-20131213011352

Either Green Lantern (Hal Jordan) or the Flash (Barry Allen). Probably the Flash because he is the Fastest Man Alive and his police scientist intellect and great speed would serve well with the Defenders or the Avengers. Though, Green Lantern would be a benefit too, because his willpower and creativity would be a threat to characters like Rhino. Marvel has a Batman equivalent (Captain America) and has a Superman equivalent (Thor). So those would be my choices.