Crossover Ideas
What crossover ideas do you ever think about that they could've adapted but didn't (or haven't)? I'm still holding out hope for a Legends of Tomorrow revival even for one season to wrap up loose ends.
But also, a crossover that I think would have been fun is one where Barry and Oliver stay on their respective shows but instead their villains cross-over. Imagine this:
Arrow S4 and The Flash S2 era. ARGUS has been following the Metahuman surge in Central City as well as the threat Hive (and Darhk) pose. They kidnap some of Barry's Rogues and install the chips in their bran stem to force them into the Suicide Squad. Their mission: infiltrate Hive HQ and assassinate Damien Darhk. The Flash part (Suicidal Rogues Part 1) can feature Diggle, Lyla and Waller coming into conflict with Team Flash after Barry notices things are too quiet on the Rogues front and finds out ARGUS kidnapped them and is forcing them to do their dirty work (ethical dilemma for Barry and company). Then the Arrow part (Suicidal Rogues Part 2) focuses on Team Arrow trying to keep the peace between Hive and ARGUS before full-blown war breaks out in Star City with metas like Weather Wizard being used as pawns.
I'd love to see interactions between Bronze Tiger, Cupid, Captain Cold, Peek-a-boo and others. What about you? It could be a massive 5 part event like COIE or smaller among other shows (Supergirl with S&L, Supergirl with Batwoman, etc.)