Several Bruce Wayne stand-in's and stunt doubles were on set today. You can see them blocking out a scene involving the rescue of a small girl and the collapsing of a large piece of the Wayne Financial building. Based on city buses and police cars, this is presumed to be in Metropolis, not Gotham. I don't know that any of these are Ben Affleck himself, but you can be the judge. At the very least, it's definitely Bruce Wayne. I think Affleck may have come on later, after I had to leave.