In 2015, there's going to be a Batman-Superman film with the same team behind Man of Steel (Snyder, Goyer, and Nolan). It's been announced at Comic-Con and it'll be interesting to see what storyline will be used to bring these two iconic comic book heroes together. Assuming that it'll be released in the summer of 2015, pre-production will probably begin quite quickly.
The DC animated movies Superman/Batman: Apocalypse and Superman/Batman: Public Enemies worked pretty well. On the commercial side, WB/DC probably think this is the best time to exploit the comic-book cinema wave, especially in the wake of The Avengers Assemble film and the notable box office receipts garnered from Nolan's involvement with Bats and Supes.
I didn't want to derail a post-match thread with an off-topic post but it'd be good to hear what members of the community think.