Again, it's possible every world is part of the 52, however you are correct; the ones I deem as part of the 52 have distinct similarities in shared geography, commonly the existence of Gotham City or Central City, as well as individuals and super-identities inhabiting those places such as Batman, the Flash, and Vibe. However, there are enough differences to make them distinct as alternate universes rather than alternate timelines.
[ An important distinction to a time travelling robot. ] Additionally, it is theoretically possible to travel to or from them, but it's rare, and every method appears to be different.
No, these particular aliens were more closely humanoid in nature. [ He's curious at the question, though. ] There are many aliens in my universe outside of Earth, of course, so it's possible there are others that are similar.
no subject
[ An important distinction to a time travelling robot. ]
Additionally, it is theoretically possible to travel to or from them, but it's rare, and every method appears to be different.
No, these particular aliens were more closely humanoid in nature. [ He's curious at the question, though. ] There are many aliens in my universe outside of Earth, of course, so it's possible there are others that are similar.
Are you thinking of something specific?