Board Thread:General Discussion/@comment-4035909-20151001204944/@comment-6331988-20151003005808

Villains who have only ever fought a hero not on either show doesn't seem like it would work. The Talons are heavily tied to Batman, just as Blackest Night is about Green Lantern. It would be interesting for them to appear, but they should focus on introducing actual Flash and Arrow villains first, i.e. Mirror Master, Onomatoepeia, Prometheus, Black Flash.

Actually, if you want Blackest Night, Black Flash could replace the Black Lanterns. He's an embodiment of death, so him creating zombies is plausible if he appears.