Ben Affleck -- Guy At the End of His Rope ... Yeah, That's Me! (VIDEO)

Ben Affleck put the turmoil of his marriage aside, and went right into Hollywood salesman mode ... charming the hell out of Batman fans at Comic-Con.

Ben and the rest of the cast of "Batman v. Superman: Dawn of Justice" just held their news conference down in San Diego -- and you'd never know he just decided to end his 10-year marriage to Jennifer Garner.

He did make one subtle reference to his personal troubles ... while still wearing his wedding ring. Watch Ben explain how director Zack Snyder convinced him he was perfect for the role. And his story about running into a former Batman is classic ... even if he's told it before.