All fictional multiverses are connected through Michael Moorcock's Eternal Champion.

Alan Moore and Grant Morrison have both cited Moorcock as an influence. Alan Moore once mentioned that when he created Marvel's full-on multiverse cosmology, he was inspired by Moorcock's multiverse idea.

Elric has appeared in both Marvel and DC comic books, as well as in the Conan comics.

Moorcock wrote a Doctor Who novel that basically makes the Doctor an aspect of the Eternal Champion too. The Doctor in turn has appeared in The Simpsons, Futurama, and The Venture Bros. In an episode of Young Justice, the TARDIS is basically depicted, though used as one end for a Zeta beam conduit.

The Elric saga is also the origin of the 8-pointed star chaos symbol used by chaos magicians (like Grant Morrison) as well as by the worshipers of Chaos in the 40k universe.

In A Song of Ice and Fire, there's this line:

"How long the darkness endured no man can say, but all agree that it was only when a great warrior - known variously as Hyrkoon the Hero, Azor Ahai, Yin Tar, Neferion and Eldric Shadowchaser -- arose to give courage to the race of men and lead virtuous into battle with his blazing sword Lightbringer"

Eldric Shadowchaser --> Elric
Lightbringer --> Stormbringer

Not to mention that Hyrkoon is literally one letter off from Yrkoon, Elric's cousin.

And in season 3 of Game of Thrones when Joffrey is asking the crowd what he should name is sword, the first response is "Stormbringer!"

tl;dr Moorcock started hypercrisis