"Not like this. I mean literally unraveling in such a way nothing would be left. Extant wanted complete control over time. Funny thing, he couldn't touch an out-of-time anomaly like me."

And that makes him think it might have to do with his being stuck here with a bunch of people from an alternate Earth.

"Though there were elements of that again...not Extant, though. I don't know who, exactly, just that the Speed Force wasn't playing nice with me or the rest of my family."