I’m not sure why The Flash was the only CW superhero show that had footage assembled for its next season, but I’m not complaining: I was dying to know what happened after Barry selfishly saved his mom’s live in the past and rewrote the timeline for everyone he ever loved. In a word, “Flashpoint.”
Source: io9 – The Flash Season 3 Trailer Reveals How Badly Barry Messed Up Reality (It’s a Lot)