Batman will outlive us all, and our interpretation was ours. Obviously, we consider it definitive and kind of finished. The great thing about Batman is he lives on for future generations to reinterpret, and obviously, Warners will have to decide in the future what they’re going to do with him. We’ve had our say on the character. I’ve got no plans to do anything more, and certainly, no involvement with any Justice League project.
Obviously this comes as a disappointment to Warner Bros., but letting Christopher Nolan pursue his own creative interests is in the best interest of all involved. Keeping him around in a producer's role for a project he isn't interested in helps no one.