The Legends of Tomorrow heroine is White Canary because Black Canary is on Green Arrow's team. Spectre was used on Constantine, or at least a police detective named Jim Corrigan was, and when Constantine's psychic partner looked at him she could see that he was dead. Constantine also has a Dr Fate helmet in his hideout. Atom, Black Canary, Speedy and Red Arrow are on Arrow - and possibly The Guardian and Mr Terrific. Flash has a lot of possible speedsters at least by name: Golden Age Flash, Kid Flash, Jesse Quick and Ms Flash/Hot Pursuit, as well as Vibe. They did a neat scene that mimicked the cover of FLASH 123, "Flash of Two Worlds". Red Tornado and J'onn J'onzz are on Supergirl. Oddly, J'onn was using the alias Hank Heywood instead of John Jones; Hank Heywood is Commander Steel in the comics. Vixen has an animated series (check You Tube) that ties in with the Arrowverse live action shows; Green Arrow, Flash, Vibe and Flash's gf Felicity were all voiced by the original actors in the first episode, and a live action Vixen is said to be in the wings on Arrow or Flash. As I said above, Supergirl is heavily rumored to appear on Arrow/Flash in May. Since the villains of the week on Flash are all from Earth-2, I'd love to see Melissa Benoist play Power Girl! I caught a Ferris Aircraft sign and a friend claims there showed a pilot with the name Jordan on his flight jacket.