Welcome to Alternity.
Here you will find my list of alternate realities, imaginary stories, possible futures and crossovers.
The criteria for the list are very simple. The world has to be connected in some way to the core Earth of either Marvel or DC and be an alternate version of that world.
Rex Mundi and Arrowsmith, for example, are both very good alternate world stories, but have no connection to the main DCU or MU, and are not included.
Note that I have adopted the naming convention of the Appendix to the Marvel Universe. i.e.: Earth-Morgan Conquest, Earth-Bishop Last X-man, etc...
I do not use the numbering convention of Blaklion's Chronology Compendium unless those Earths are named that way in a comic book. i.e. DC Pre-Crisis Earth-1, Earth-2, Earth-3, etc...
Cartoons, movies, TV shows and their alternates are listed ONLY if there is a comic book adaptation. The X-men movies and Teen Titans cartoon are included, the old Adam West Batman show, sadly, is not.

Six degrees of separation

So how do some of these non-DC/Marvel worlds connect to the two big guys?

Straight Alternate. If a character exists in universe A and a recognizable version of the character exists in universe B, then those universes are alternates of each other. Some characters, such as Dracula, Frankenstein, Doc Savage, the Shadow and the Lone Ranger fit this idea, and thus all their appearances can link their universes back to the main pair.

Crossovers. If a character from universe A has crossed over to DC or Marvel and a character from universe B has crossed over to universe A, then that character has a connection to DC/Marvel. In theory, that character could travel all the way across universes to DC/Marvel. This holds true no matter how far away from the DC and Marvel Universes you get. As long as there's a connection. Sometimes, instead of a character actually traveling to a new universe, characters from separate universes exists side by side in a merged universe. Since this is a straight alternate, it counts.

Multiple publication. If the same universe is published by the same or different companies with enough differences that it might be considered a separate universe, then it's included. It's the same principle as including what ifs and elseworlds. It's the same Earth and the same characters, things just turned out slightly different.

Fictional reference. This is the most tenuous connection. If universe A contains a comic, movie, novel, etc. of the characters of universe B, then there might be a connection. This principle originated at DC when the Flash of Earth-1(Barry Allen) met the Flash of Earth-2(Jay Garrick), who Barry remembered reading about in comics. The explanation was that the writers and artists of Earth-1 were 'attuned' to Earth-2. This idea has been used on several occasions and I see no reason not to extend it to other universes, especially if different universes are published by the same company. This isn't a hard and fast rule, and I'll be using my best judgment.

Favorite Destinations

	Earth: Authority's costume colors are reversed	Wildstorm Winter Special 2005
	Earth: Catwoman in ancient Egypt	Catwoman Annual #1
	Earth: Jean Grey falls for Wolverine	What if #60
	Earth: Star Brand Reed	Fantastic Four #570
	Earth: Malice kills the Fantastic Four	Fantastic Four #47

Why not visit..

	Earth: "Black Tom" Strong	Many Worlds of Tesla Strong
	Earth: Young Justice as detectives and gangsters	Young Justice 80 Page Giant
	Earth: Spiral rules world	X-Force: Shatterstar #3
	Earth: Spider-Man uses logic to defeat villains	What if #34
	Earth: Antivision	Avengers #359

Recently Added

	Earth: New Crusaders	New Crusaders #1
	Earth: The Shadow becomes a cyborg	The Shadow #1
	Earth: The Phantom is more high tech	The Phantom #1
	Earth: Doc Savage has a grandson	Doc Savage #1
	Earth: The Spider wears a different costume	The Spider #1

Recently Updated

	Earth: Bruce Wayne becomes Cobra	Batman #682
	Earth: Vampire Eternals	Uncanny X-Force #23
	Earth: Usagi Yojimbo	Usagi Yojimbo #1
	Earth: Two Ghost Riders	Ghost Rider #33
	Earth: Urban Gothic	Aftermath #1