This issue opens in an alternate reality near future where Barry Allen and Iris West have married and their two children with speedster powers are busy destroying Flash’s home city. He confronts them, and they whine about how he never had time for them. (Note: their names are Don and Dawn. Think about what a bad idea that is: they’d never know which one you were talking to or about.) The scene is being watched by our regular Barry and Iris in the 25th Century, courtesy of Reverse-Flash, who is getting into both of their heads with guilt trips and suspicions about each other, finally taunting Barry into following him into the negative speed-force.
There’s a lot of soap opera in this book, but here it’s made more interesting by the time-travel and alternate reality angles. Not a bad read, recommended.