From the character screen I think that's Joker on the third from the left. I think Sinsetro is the 2nd from the top right and Dr.Fate is to his left. Looks like it could be Robin under Supergirl. Flash looks like he's under Superman. No idea who the teddy bear looking guy is, possibly Captain Cold with his hood up. Maybe Black Canary next to him. Looks like Blue Beetle in the bottom left corner. That's all I got and I doubt any of it's right.
But I really hope the roster is larger since they still have till 2017.