Batman is being introduced in to this DC Cinematic Universe continuity in a very unorthodox way - particularly in comparison to previous Batman franchises. The caped crusader will make his first appearance (as controversially portrayed by Ben Affleck) in the movie dubbed the Man of Steel sequel, Batman versus Superman. At the age of 41 and with the Batman versus Superman production still to finish, it's unlikely that Ben Affleck will be playing the Dark Knight for the long haul, so a standalone Batman movie will likely see him ending his days as a masked hero, mentoring a younger character (such as Nightwing) to continue his legacy and passing on the responsibility of fighting Gotham's crime to a new hero who will then join up with the Justice League (perhaps with Affleck continuing on as Bruce Wayne in a consultant role to the superhero team). It was weird enough finding out that the new Batman would be introduced as a middle-aged man in a Superman sequel, so the thought of him not getting his own movie in this new continuity is... well... unthinkable. Therefore, it's only logical to assume there'll be more to Batman than just a guy who appears in other hero's movies and ensembles. Warner Brothers and DC know full well that Batman movies are big money-spinners. There'll be a standalone instalment in this continuity, for certain.
