‘Supergirl’ Explains ‘Flash’ Crossover, ‘Arrow’ and ‘Legends’ Joining Next Year?
Supergirl has steadily unveiled more and more of its upcoming Flash crossover, though without perhaps acknowledging how The CW’s Barry Allen ends up on CBS. Now, a new report reveals the mechanism behind our Super teamup, while Grant Gustin teases the possibility of adding Legends of Tomorrow and Arrow into the mix next year.