LEGO Batman 2 will released under the title, LEGO Batman 2: DC Super Heroes, according to artwork for the game posted by bricktuts.com.
Already rumoured for release in 2012, the sequel will include not only Batman, but also DC super heroes Superman and Wonder Woman, so suggests the artwork.
In July The LEGO Group announced that the DC Super Heroes toy range would be released in 2012 and feature "13 iconic super heroes": Batman, Robin, Catwoman, The Joker, The Riddler, Two-Face, Poison Ivy, Harley Quinn, Bane, Bruce Wayne, Superman, Lex Luthor and Wonder Woman.
Green Lantern isn't listed in the 13, but is featured on the toy range's website.
Warner will publish the TT Games production.