"Crisis on Infinite Earths" is nearly upon us. After years of hinting that a red sky crisis was coming and that The Flash would vanish in it, we're just weeks away from that catastrophic event becoming reality. That means that the vast world of the Arrowverse and it's countless alternative Earths are all in danger from the coming antimatter threat. Those alternative Earths are places that fans of the Arrowerse have had multiple tastes of and introductions to over the years, building a rich world of different characters and adventures across The CW network's DCTV shows.