Seems the focus of Arkham War is a battle for Gotham between Bane and Scarecrow, each leading an army of villains against the other. Bane has Deadshot and Emperor Penguin, but Scarecrow has Killer Croc :(
Geek: Tell us a bit about the cast of this series - which Arkham inmates are you particularly focusing on? Who are the central characters? And were there any villains you wished to use that weren't available?
Tomasi: The main characters of ARKHAM WAR are Bane and Scarecrow, each one leading their respective army against the other for control of Gotham in their own inimitable ways. The Bane and Scarecrow one-shots set up their master plans and lead directly into ARKHAM WAR. And I'm pulling outta the toy chest an amazing amount of villains and using exactly who serves the story I wanna tell with even a surprise or two!
Full interview with Tomasi here.