This is beginning to look like a Batman game I might actually buy. Based on the Batman universe we know and love from the comics, it takes place in Gotham's famous nut house who's residents are a who's who of the caped crusaders rogues.
The game play looks to be part open world exploration inside the asylum and part stealth action, think die hard only in a looney bin filled with villains that he put in their ready to do the old batsy in.
Plus they've signed Kevin Conroy ( the voice actor for Batman from T.A.S ) and Mark Hamill as the Joker ( also reprising the roll he mad famous in T.A.S )
here's a clip, enjoy: