Like what happened between Oliver and Barry... and now that everything is happening on the same earth, it's kinda possible.
Anyways, I think it can be amazing to see sara and the super friends, and kara and the legends... just imagain her reaction to the messiness of the legends
On the minus side, it can be very wired 'cause we barely saw those two teams interact with each other
But then again, I'm DYING to see Melissa Benoist in the Canary suit, and I think that caity can do wonders as supergirl, since she can fight.