Hoggoth writes, This article on Yahoo reports that filmmaker Wolfgang Peterson has stopped work on the Ender’s Game movie in order to work on ‘Superman vs. Batman’.

The quote:
Petersen says he will temporarily shelve his other Warners projects–the epic Trojan War and an adaptation of Orson Scott Card’s sci-fi novels Ender’s Game and Ender’s Shadow–and will begin working on Superman vs. Batman.

More information on both projects is available from this Ain’t It Cool News article.