A mysterious spin-off of Arrow and The Flash is on the way to the CW. Few concrete facts are yet known about the spin-off other than that it is a superhero team up show and will star Brandon Routh as Ray Palmer/the Atom, Wentworth Miller as Captain Cold, Victor Garber as Dr. Martin Stein, and Caity Lotz who (spoilers) played Sarah Lance (Canary), a character who is now dead in this universe, so her role in the show is currently unknown.
Now, a new character is set to star. Dominic Purcell will be joining the cast as Mick Rory, or “Heat Wave”. He has appeared once in episode ten of The Flash along with co-star Wentworth Miller as one of the deadly Rogues. He is poised to return in next week’s episode, “Rogue Time”. This spin off is in development from Greg Berlanti, Andrew Kreisberg, and Marc Guggenheim, creators of Arrow.