Batman Beyond (season 3, episode 8)

The call: part 2 Release date: 111800 Plot: To get to the bottom of the problem facing the Justice League, Batman must face off against his own teammatesincluding Superman himself. He must seek the help from Bruce who knew of an old enemy of theirs, Starro the Conqueror. Though he defeats it and a grateful Superman offers him to join the Justice League, Batman refuses, understanding why the original Batman did not join the League fulltime in the first place.