I'd love to see Marshall kick some butt ^_^
Unfortunately I don't see that happening. He'll probably too terrified to remember all those things that memory of his registered on the mission, thus, no Marshall in the CIA. Too bad, we could have been treated to such exchanges as:
Marshall: Ummm...Mr. Vaughn...you wouldn't...ummm...happen to have a thing for...ummmm....Ms. Bristow would you?
Vaughn: Well, actually......(Vaughn passes out from the drug Marshall slipped in his drink for stealing Sydney from him)