We've been learning bits and pieces about the proposed Arrow/The Flash spin-off series for months now. We've been given small nuggets as to which characters we'll be seeing but the matter of the plot was left open ended...until now:

With this synopsis we were also given a title: DC's Legends of Tomorrow. The spin-off is set to star Victor Garber, Brandon Routh, Arthur Darvill, Caity Lotz, Ciarra Renée, Franz Drameh, Dominic Purcell, and Wentworth Miller.