The LEGO Ideas group have released this video announcing their next two projects and the results of the review process. In the video we see the different projects that were being considered, including a Batman: Attack On Wayne Manor set and an X-Men: X-Mansion set. But the winner from that group turned out to be a LEGO Wall-E set.
They had also said previously that they had been looking into a Doctor Who set and have decided on The Doctor Who And Companions set. Though the submitted design included both the Fourth and Tenth Doctors, the set is just coming out of the judging phase and actual details of what will be in the set remains to be seen.
At the end of the video they show the next batch of sets being considered and oddly enough, one of them is a SHIELD Helicarrier which has already been announced.