Ben Affleck, Matt Damon insult each other with Batman, Jason Bourne taunts

Matt Damon used a social media video to take a swipe at buddy Ben Affleck over his replacement as Batman by Robert Pattinson. In a new video promoting a fundraiser they're doing through the charity site Omaze to benefit the Eastern Congo Initiative (which Affleck co-founded) and water.org (which Damon co-founded), the actors get some digs in about the iconic roles the other has played and then seen taken over by someone else-including one specific superhero.

The Boston besties bring up Pattinson (taking over as Bruce Wayne in The Batman) and Jeremy Renner (who "expanded the Bourne universe" in The Bourne Legacy, as Damon explains) in a video that's as amusing as it is lo-fi.

Fans couldn't stop laughing after watching Ben Affleck's reaction, knowing that Ben chose to quit the role of the caped crusader after appearing in couple of DC movies.

"No. Jeremy Renner will be there, though", shot back Affleck as Jeremy Renner starred in The Bourne Legacy.

Anything can be discussed at this lunch, including, as Damon says, "roles that we've played that maybe other people have played too, to winning effect".

"Jeremy Renner did not play Jason Bourne", he said. "He expanded the Bourne Universe". One day Affleck will get to find Damon's secret private Instagram account - in fact, maybe that's what the victor should ask about after generously helping support a pair of world-improving organizations.

Pattinson is set to take over the role of Bruce Wayne from Affleck for The Batman, which is now filming in the UK. They won an Oscar together. And now their next big project will be getting to know YOU over lunch. Ask Matt and Ben all your burning questions like "When is Good Will Hunting 2 happening?" and "Who would win in a duel?" And be sure to snap a selfie or twelve. Ben Affleck will also be back as Batman for the upcoming The Flash movie.

Affleck's Batman will also be seen again in the Snyder Cut of Justice League, which will debut as a four-part series in the U.S. on streaming service HBO Max next year.