Leaker James Mack claims that the DC Universe version of Bruce Wayne may appear at the end or in a post-credits scene of the film Superman, paving the way for the announced Batman film The Brave and the Bold. The actor playing Batman may also be revealed at that time.
Both claims are currently just rumors. James Gunn has not yet confirmed Bruce Wayne's appearance or the related casting.
Superman centers on Superman and Lex Luthor teaming up to confront Brainiac. The Brave and the Bold is a DC Universe project focused on Batman and Damian Wayne's version of Robin.