[Poison Shadow]

I was gonna hold off on this because his costume will inevitably change and possibly go through several different phases, but screw it, I love the show and hopefully this one sells well enough to get us Captain Cold, Multiplex, Mist (who could also double for Zasz!), and Plastique... not to mention another spoilerific villain who was already spotted in set photos battling The Flash.

Hell, gimme an action figure of Professor Murderwheels while they're at it.