While we know that DC superstars Geoff Johns and Jim Lee are doing an all new story, what we didn't know is that the issue will feature Pandora, the mysterious hooded lady that first appeared in Flashpoint, and has been seen in every single New 52 debut issue.
Apparently the FCBD issue will feature Pandora with her point of view on all three of the combined DC Universes, the "old" DCU, the Flashpoint U, and the "New 52" Universe. We'll also see Pandora's motivations, and just which characters and events she is closely watching.
Update: The three Universes mentioned could be the "old DCU, Vertigo and Wildstorm, as stated in the comments below.
Jim Lee is also said to be doing a fold-out four page spread, with Kenneth Rocafort, artist on Red Hood, doing a back-up.
Info via Bleeding Cool.