A few days ago, there was a report that there was a LEGO DC Comic Super Heroes set that would include a Ra’s al Ghul minifigure. Just2Good now has the set name and number which is Rescue from Ra’s al Ghul (76056). He also stated that the set will a store exclusive but as to which one remains unknown. It’s also rumored that Talia al Ghul would also be in the set but J2G didn’t have info on that. It’s not too much new information but at least there’s confirmation that the set exists.
Update: Just2Good over on Eurobricks has given the list of minifigures that will be in the set including Ra’s al Ghul, Talia, Damian Wayne’s Robin, and Desert Batman.