>>84970504I'm pretty sure this is all due to the power Johns has now.
They should do a Crisis-like event between all the CW/DC shows and merge the Arrow/Supergirl universes in one.
Think about it, the only reason Supergirl was in another entirely different universe from Arrow and Flash is because they were in different networks. Now that is not the case. And the only reason Flash and Arrow couldn't mention the existence of Superman is because they couldn't use him. And that's not the case anymore. So what's the point on keeping it all on different universes?