Following a screening of Batman: Year One, WB animation producer Bruce Timm announced to the audience their next movie projects.
The next feature will be Justice League Doom, an adaptation of Tower of Babel. Following that will be Superman vs. The Elite, and then the long await The Dark Knight Returns.

The Dark Knight Returns will be Warner Premier’s first two part feature, and Timm said the movie will be very faithful to the original. No voice cast has been announced by Andrea Romano said she is interested in bringing long time Batman actors Kevin Conroy and Mark Hammill on board. We first reported TDKR would be a future project in April.

Timm was also asked about Kingdom Come as a possible project, but said that the style of the artwork does not lend itself to 2D animation. The Killing Joke remains a possibility for the future.

Via IGN