This post is in regards to the episode where Flash travels through time. First off, I'd like to say that I'm basing all of this on multiverse theory, which states that for every decision made, a separate timeline/universe is created in which that decision does not occur or something different happens.
So I was thinking: Barry never traveled back to the future. Instead, he created an alternate timeline in which none of horrible events leading up to his jump through time took place. Since he never went back, this means that in the original timeline Central City was decimated and The Flash disappeared. Given that Arrow is most definitely in the original timeline, another crossover between the shows should be impossible since Barry no longer exists in Arrow's timeline. On another note, shouldn't there be a second Barry running around somewhere out there? I'm pretty sure present Barry and past Barry both exist in this new timeline.
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