After the events of my justice league story
Barry Allen has been on fire recently since the events of parallax he’s been catching villains until one day he wakes up to a empty central city
It’s revealed that reverse flash created has trapped Barry in a paradox in the timeline
Barry spends what would be considered months to him but hours to others in isolation before he gets out
Barry comes out darker and vengeful to reverse flash and in turns slowly becomes reverse flash on how he starts dedicating time to find and destroy Thawne
Ending with Barry pulling himself together and resisting the urge to kill thawne and instead putting him in a speed force prison where instead of soaking up the speed force his speed is drained from him