Board Thread:New on Arrowverse Wiki/@comment-807326-20160206040643/@comment-2054358-20160216000004

ArrowFan456 wrote: I just understood! In, they're showed Supergirl and the 1990 The Flash. These two shows are property of CBS.

So maybe, we have two universes: DC CW Universe (Arrow, The Flash, Constantine, Vixen, DC's Legends of Tomorrow) and DC CBS Universe (1990 The Flash and Supergirl) who will crossed over in "Worlds Finest"!

It's a possibility, maybe 1990 The Flash and Supergirl are set in two different universes, maybe they are set in the same universe, I don't know.

What do you think? It's been confirmed to be Grant Guston's Flash to be crossing over. Not the 90's Flash.