And by weird, I mean the kind of insanity that would drive normal people to their breaking point as they question reality. The kind where you question what drugs the writers were on to come up with that, or worry for their mental health.

Things like the Peter Parker Clone Saga. Or the scene where he is turned into a spider, somehow gets pregnant, then dies and then basically gives birth to himself by bursting from the body. Or the time Jason Todd gained the power to turn into a tentacle monster and ate a guy. Or just... Most of Supergirl's history apparently. (I have only brushed the surface, but DC's edict make Superman the last Kryptonian led to some convoluted explanations to continue using legacy Kryptonian characters. Also, her horse had a raging crush on her and is technically an ex thanks to human-transformation shenanigans.)

Mainly thinking of DC and Marvel, but I'm open to other long-running comic book universes. Because with enough time, writers have to get creative to fill in issues, and stuff gets WEIRD.

the two examples that I have are Final destination movies and junji ito's manga "Uzumaki".

it doesn't have to be a manga or movie of course, I just would like something similar but it can be any medium. books, movies, games etc

This is one of those posts that make me wish we could tag multiple tildes. Because this would apply to ~tv, ~movies, ~comics, ~games, ~books, and ~anime, with possibly even more.

A long time ago I read an article about weird crossovers, and it made the point that thanks to unrelated crossovers and six degrees of separation, the Archie comics Sonic technically existed in the same universe as... Some popular live action shows, because that show had a crossover with some other show that crossed over with Sonic. Obviously not really, but it was a funny thought.

I failed to find the article I remember, but my brief search did bring up the Tommy Westphall Shared Universe, which comprises 400+ shows thanks to various crossovers, cameos and in-universe references. There is a whole fandom wiki dedicated to it. There's also this site that lets you search for connections between TV shows. The site's description from DuckDuckGo is "Easily search and find the relationship between shows in the Tommy Westphall Universe and beyond." It's silly, but fun!

Thing is, most of my cursory searching into it has people focus on live-action TV and movies. And... Well, like I said at the start: the article I remember reading made a connection between Archie comics Sonic and some live-action show thanks to some crossover.

Since that first article, I've wondered off and on about the weirdest crossovers out there, and just how weird of a shared universe could exist. I don't want to limit it to one or two mediums, I want to find crossovers that can transcend mediums! Comics, TV, games and more!

So: what are the weirdest crossovers, cameos and in-universe connections you know of? What are the wildest connections we can make? And, for bonus fun, what are the ramifications of shoving all these wildly different series into one ridiculous universe?? how many different apocalypses can we shove into it