I wonder if this means we'll see the Red Skull (the original, or a new one). After all, it doesn't really make sense to have Crossbones if the Skull isn't somehow involved.
Casting the DC Universe
Green Lantern/Hal Jordan: Jason O'Mara
Nightwing/Dick Grayson: Jack O'Connell
Zatanna: Jessica Szohr
Poison Ivy: Alexandra Breckenridge