Another Dark Knight Returns sequel?
According to a report from Bleeding Cool (and corroborated by CBR), Miller is in talks to collaborate with current Batman writer Scott Snyder for a third Dark Knight mini-series.the mini-series would jump farther into the future and mirror the original comic. The focus would now be on Batman's former sidekick Carrie Kelly as she too battles old age and the need to find a replacement. Apparently the plan is for Miller and Snyder to co-write the series together and for a rotating team of artists to illustrate it. Among the potential candidates named are Greg Capullo, Jim Lee, Marc Silvestri, Andy Kubert, and Sean Murphy.
http://au.ign.com/articles/2014/12/04/is-dark-knight-returns-getting-another-sequel