As noted by Weimlady in comments, the site IO9 has posted renditions of movie posters by Australian artist Josh McMahon for a hypothetical third Christopher Nolan Batman movie. The hypotheticals? The “movie” stars Marion Cotillard as Catwoman, Kristen Bell as Harley Quinn, and David Tennant as the Riddler.
Of course I can’t resist swiping the Tennant poster to post here:
Click over to IO9 to see the Catwoman and Harley Quinn posters.