User blog comment:ImperiexSeed/Black Flash, originality/freshness, and the final season/@comment-28428105-20161101185811

Maybe this is how Black Flash comes into the fold. We have a speedster as one of the big bads. Black Flash collects speedsters who are dead (or going to) and takes them to the speed force which is basically purgatory in a sense for speedsters. Xander I too would like to see Black Flash chase Barry and Jay try to help him