The fandom reaction to this is going to be fun to watch.
It seems like a choice fans are going to hate, and I also happen to think it's a shitty one. Ben Affleck has about the range of Tom Cruise. Just like every movie with Tom Cruise is Tom Cruise IN SPACE or Tom Cruise as a PIRATE NAZI, so is a Ben Affleck movie.
He's just.... a generic vaguely angry Red Sox fan. In every film. I honestly think Orlando Bloom would have been a better choice.... his fops all seem different.