Ben Affleck -- Surprises 'Batman' Fans At Comic-Con

Ben Affleck wasn't in full Batman gear but it didn't matter when he surprised thousands of fans at Comic-Con.

Affleck, who is directing and starring in the next installment of the franchise popped into a panel with fellow DC directors David Ayer, Patty Jenkins, Zack Snyder, Rick Famuyiwa and James Wan.

It's pretty cool ... Affleck has a "nerdy moment" of his own and snaps a pic of the crowd.

They also revealed the new trailer for "Justice League" and it looks awesome.