The impact of Arrow's "Crisis on Infinite Earths" crossover was a huge undertaking. Arrow's co-showrunner Marc Guggenheim has credited the consistency in storytelling following the event, creating a post-"Crisis" multiverse, to "good compromise" across the board.

According to Guggenheim, there was a promise made at the very start of the process that the status quo would be restored in the end. "That was the promise I made to all the powers that be when we were pitching this. I said, 'Look, if you give us access to the toys, I promise we will return the toys to the toy chest," Guggenheim informed Fake Nerd Podcast. "For example, it would be a dick move to destroy Titans and not restore Titans, you know? That show still exists! So it was the only way."

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He explained, "Narratively speaking... it would be cleaner if we just ended up with a single universe, but that would have meant that a variety of the different universes that I wanted to visit in the space of the crossover, we wouldn't be allowed to use." He then compared the crossover to the comic book source material, "So I thought this was a good compromise, particularly since -- as we know from the original comic book -- even though the original Crisis comic ended with a single universe, we know that didn't last very long."

He then summarized that ultimately it was a matter of getting to the heart of the story and compromising further by having some of the crossover's characters remain oblivious to the established multiverse. "So there's still some story to tell there. We'll have combined various Earths... so that there's a consequence for the Arrowverse, while at the same time restoring the various universes that we 'borrowed.'"

All five episodes of "Crisis on Infinite Earths" are set to be included with the Blu-ray releases of Arrow: The Eighth and Final Season and Arrow: The Complete Series as a special limited edition bonus disc. The Blu-rays are slated for release on April 28.

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