Season 3 also marks a change in the Arrowverse as Supergirl is officially brought into the fold with the first episode airing on October 10th. We had previously been told that because she was on a different network, she would remain in a different universe. Well apparently things change.
The Arrowverse is then rounded out with DC’s Legends of Tomorrow on October 13th.
What is going to happen next is hard to tell. At the end of The Flash Season 2, we saw Barry Allen heading to the past to save his mother’s life. You can only imagine the effect that the timeline ripples will have across the entire Arrowverse.