"I’m really excited for it," Damon dished. "The thing to be most excited about is our director, Paul Greengrass is back -- that's what I'm most excited about -- hopefully we can make one that's on par with the other ones we did."
Walsh, who helped the actor get in shape for past Bourne movies, also trained Damon for the latest installment.
"Working out with me is easy, working out with [Jason] is hard," Damon admitted to ET. "He pushes me as hard as I can go, basically. … He’s a very strong guy, so I gotta keep up with him."