Television Crossover Universe

Well, spoilers, but the Television Crossover Multiverse is gone, so... see you all in January... But seriously, I revise my thoughts and think that somehow a merged Earth may emerge, in which case all TVCU will be retroactively pulled into the Arrowverse. Does that mean we can't use alternate realities anymore? Not really. DC kept using Hypertime as a new "multiverse" following Crisis, so I imagine so can we. So we don't have to say Alien doesn't exist just because it doesn't fit in the Arrowverse.

Technically, for the sake of this timeline, I will be combining several continuities into one canon.  With this post I will be incorporating the "post-Crisis" canon, the "post Zero Hour" canon, the "Post Infinite Crisis/New Earth/Earth-0" canon, and the post Crisis version of Crossover Earth. Following the Crisis on Infinite Earths, DC rebooted Superman's canon.  Very little that came before still happened.  This was a new timeline.  Though Superman had been operating for a few years in this timeline, those stories were told in flashbacks over time.  Zero Hour provided a soft reboot of the DCU that had very little effect on Superman.  Superman:  Birthright came out before Infinite Crisis and Supergirl (Kara) reappeared just before Infinite Crisis, both retconning some post-Crisis era stories, mainly negating a lot of John Byrne's mythology that started with Man of Steel.  Infinite Crisis rewrote a bit of Superman's past again, but was still a...