The 45-year-old actor says this time the Dark Knight knows he needs help, reports Us Weekly.
"In 'Batman v Superman', he was at the end of his rope. But in 'Justice League', he's finding hope again. He has to open up and play well with others. He knows he needs them.
"He's sort of the ultimate loner, but he's really trying to make it work and develop a good relationship with all of them. He might be a mentor to The Flash," says Affleck.