While WB has been pretty mum about story bits for their upcoming Batman Arkham animated film, the only thing that was currently known was that the new Assault on Arkham film would revolve around the Suicide Squad. However earlier this week we were lucky enough to receive an advanced Blu-Ray copy of Son of Batman from Warner Bros.. which releases on May 6, 2014 on DVD, Blu-Ray and Digital download and one of the special features exclusive to the Blu-Ray edition has a preview of the upcoming Assault on Arkham, which reveals some more concrete info on the Arkham Asylum prequel.

Warning: Spoilers Ahead.

In the exclusive Blu-Ray preview for Assault on Arkham it reveals that The Riddler is seemingly the main antagonist, which is odd considering The Joker had been revealed earlier on in the trailer. The Riddler has hacked into Amanda Waller’s computer and downloaded a list of every member of the Suicide Squad, though what he planned on doing with the information wasn’t told. Harley Quinn has also planned to use the Suicide Squad in an attempt to break The Joker out of Arkham.