If you’ve seen the end of The Flash season 2, you know that Barry Allen went back in time to save his mother from being murdered.

If you haven’t seen it, too late.

This will have ripple effects all over Barry Allen’s timeline, resulting in a storyline that they’re going to actually call Flashpoint, after the original comic book storyline.

However, in this case, it’s not going to just mess with the universe of The Flash, but every other DC show on CW. And in case you were worried that it’s going to be an entire season that has to be undone by the season finale … don’t. It’s only going to be a few episodes.

How will this change things? Well, to start with, it should make it problematic for the conclusion of season 3 to have happened, since Barry saving everyone was key. It should kick off the Legends  cast showing up on the Flash, if only because that’s the new premise to the show. For all we know, it’ll bring Laurel Lance back from the dead, and merge Supergirl with the rest of the CW shows.

Also, the enemy for this season of The Flash will be Savitar, a creature who will try to make an entire army of speedsters. May the fun begin.

While waiting for the new season, if you haven’t already, you might want to pick up Honor at Stake. Preferably before the sequel comes out.