By Daniel Dern: If you don’t want to know how any of these movies/shows end, keep reading…
1, Thanos’ “snap!” didn’t kill people, it sent them into other realities… including Westeros.
So as the Westerosians are gearing up for The Big Battle Against The Big Bad, who should pop up but The Hulk, Spider-Man, etc. Possibly including an adjustable Iron Man suit for Tyrion Lannister!
2, Meanwhile, it turns out that over in Middle-Earth, the the Ring of Power didn’t actually melt in Mount Doom, it, too, reality-hopped over to Westeros… either bringing along Sam Gamgee or merging him with Samwell Tarly. And, it also turns out, when Shelob nipped Sam G back in Camp Mordor, she was radioactive, so yup, Sam has the proportionate powers of a Really Big Strong Spider.
3, Meanmeanwhile, Loki and the shattered bits of Mjolnir have appeared in the Slow Zone of the Gateway in The Expanse. Loki uses protomolecule to repair said Uru Hammer, hijunks ensue…including one episode where Loki, Orlando Bloom as Legolas, and Will Smith get involved in a caper against the Guardians of the Galaxy and the crew of the Orville.
4, Hermione and half-or-more of the leading female magicians in The Magicians are summoned by Danaerys to help fight The Night King, by resurrecting/rescuing the co-opted dragon… and summoning Every Possible Dragon From Everywhere, including the Pern ones, Fing Fang Foom (arguably not a dragon but just looks like one, but magic spells often can’t tell the difference), the Jabberwock (ibid), Puff, and Puff’s brother Piff (https://piffthemagicdragon.com/).
5, GotGalaxy’s Star Lord (Peter Quill) manages to grab the One Ring…and/but, typically, universe swaps out Thanos for Darkseid. Darkseid Omega-Beams’s StarLord into the Lego Batman Universe.
6, Back in Westeros, Swamp Thing, Man-Thing, Groot and the Ents, plus Jason Woodrow (DC’s Floronic Man) and Poison Ivy (bringing back Uma Thurman to to play her) are trying to shore up defenses around where the Knight King and his Army of Grunting Things are getting ready to attack.
7, Snappy dialog and witty jokes-in-the-face-of-death! Sundry hookups in stolen moments! Peter Parker gets interogated by Sansa, Danaerys and Tyrion! Cats overrun protomolecule’d Venus! Last minute betrayals, double-dealings, surprises, and more.
As for the actual ending(s), couldn’t tell ya…