The Crossover UniverseTM is a companion blog to the books Crossovers: A Secret Chronology of the World Volumes 1-2 by Win Scott Eckert, and the forthcoming Crossovers Expanded Volumes 1-2 by Sean Levin. Material excerpted from Crossovers Volumes 1 & 2 is © copyright 2010-2014 by Win Scott Eckert. All rights reserved. Material excerpted from Crossovers Expanded Volumes 1 & 2 is © copyright 2014-present by Sean Levin. All rights reserved.
30 Days of Night also crossed over with Niles Cal McDonald series.There also has been of all things an X-files/Teenage Mutant Ninja Turtles crossover released. I don't know if that one could be considered in the CU.
Yep, I have the 30 Days of Night/Criminal Macabre crossover already written up, and Jay Lindsey sent me some more Criminal Macabre crossover info yesterday.Yeah, I'm somewhat hesitant to include the X-Files/TMNT story, which is part of an X-Files crossover event that also has them meeting the Ghostbusters and the Transformers. Probably warrants inclusion in the AU section, at least.
I seem to remember there was some sort of Cthulhu Mythos references in one the TMNT comics. So I guess the TMNT universe is an AU. But I know the comic storyline tons of superheroes and at least one alien invasion so it couldn't be the CU.