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What if ...... After Owen gets attacked by zombie Digger in the Darkest Night, his speedster instincts kicks in and he "accidentally" runs right through the Speed Force, where it end ups healing him, and increasing his speed ( something like what happened to Wally). But at the time he puts himself together, and finds a way out of there, when he gets out he's in the rebirth universe ( maybe like Jojo where the universe restarted and it's different now ).
Of course after getting out of the Speed Force he collapses from exhaustion. But all of that caused an alteration in the Speed Force that some speedsters could feel, and who came to rescue him? ( * Sounds of suspense drums*) His grandfather, Eobard Thawne.
( I'm gonna write more later, finally the school is over 🙏🙏🙏, I was very tired, and I have a lot of things I want to post on Tumblr)