User blog comment:Xandermcc/Crisis on Earth-X + Dark Multiverse Theory/@comment-26922391-20171121024430/@comment-1330227-20171121064910

Then maybe Thawne dies during the crossover and Barry takes his place. Or maybe there are two nazi Flashs like there is both Dark Arrow and Prometheus X. It's weird that we've been told about Prometheus X but they haven't appeared in promos (as far as I've seen) or the promo photos released last week. Their only appearance was in the Jimenez artwork. But, the lack of Prometheus X in promos makes it a little more likely that there will be two speedsters.