Most of that had to do with Barry entering the Speed Force in order to avoid Armageddon, of course, and it sounds like Central City is going to go quite a long time without the Scarlet Speedster around to help out.
According to star Candice Patton, Barry is going to be trapped in the Speed Force for over six months, and that’s just the minimum.
When The Flash brought Season 3 to a close, things were reaching status quo for this show’s finales, meaning happiness was all but absent and the future looked completely out of control.