Arrowverse: 10 Implications From Crisis On Infinite Earths
1. Titans And Doom Patrol Are Confirmed To Be In Alternate Universes
Moving away from Earth Prime, Crisis on Infinite Earths has also given us a glimpse of various other alternate Earths in its closing montage. Two of which are Earth-9, which is the universe inhabited by the Titans series and Earth-21, which houses the Doom Patrol.
Despite the Doom Patrol being introduced on an episode of Titans, there has been much confusion as to whether the two shows are in the same universe or different yet closely related universes. This was unclear as the showrunners have not given a straight answer either way.
With this, it is clear that the two shows are in different universes and that they can both be their own thing without worrying whatever the other show has done. This would be interesting as that means there should be a Doom Patrol team in the Titans universe whilst the Doom Patrol universe may or may not have their own version of the Titans.