Since the first crossover between Flash and Arrow was a mega success, the CW noted that they would do an annual teamup with the two shows. The next crossover is coming this December, on the 1st and 2nd no less. And according to the official synopsis for both episodes, this will serve as a “prologue” for the upcoming series Legends of Tomorrow. As you’ll notice in the titles.
First up, Flash will kick off the crossover with “Legends of Today”:
“In its second major crossover event with “Arrow,” Vandal Savage (guest star Casper Crump) arrives in Central City and sets his sights on Kendra Saunders (guest star Ciara Renée). After Vandal attacks Kendra and Cisco, they turn to Barry for help. Realizing how dangerous Vandal is, Barry takes Kendra to Star City and asks Oliver and team to hide her until he can figure out how to stop Vandal. However, things quickly go from bad to worse when a man with wings AKA Hawkman (guest star Falk Hentschel) shows up and flies off with Kendra. Meanwhile, Harrison develops a serum to make Barry run faster and asks Jay (guest star Teddy Sears) to test it out.”
Then, Arrow will conclude the crossover with “Legends of Yesterday”:
“Oliver and Barry Allen take Kendra Saunders and Carter Hall to a remote location to keep them hidden from Vandal Savage while they figure out how to defeat him. Malcolm arranges a meeting between Vandal, Green Arrow and The Flash that doesn’t go as planned. Meanwhile, Felicity, Thea, Diggle and Laurel work with Team Flash to come up with a weapon powerful enough to destroy Vandal Savage.”
Legends of Tomorrow is scheduled to come to the CW in 2016.