in the recent Elden Ring Shadow of the Erdtree story trailer was any indication, the DLC will have a lot of crucial lore to fill in about the Lands Between and the origins of that big golden tree.
Everything in Shadow of the Erdtree will be picked apart and analyzed over the next several years, as is the case with anygame, but I've gathered up four preliminary fragments of lore that have been rolling around in my brain from the moment I had to put the controller down. The thing is, we don't have a lot of concrete information about the GEQ other than that she was an empyrean, or a person capable of becoming a god, just like Miquella, Malenia, Ranni, Marika, and several other major characters in the game. She used the power of death and her Godskin followers—the grotesque enemies wrapped in bleached white skin—to slay gods until Marika had her killed by Maliketh, the wolf man you battle near the end of the game.
Miquella's Haligtree, which you can find in the second half of the game, was intended to be a safe haven for all of the people who came from or had ties to the Crucible. Miquella tried to use his blood to grow a copy of the Erdtree without a connection to the Golden Order. It didn't work out and it seems like he's trying to do something similar in the Land of Shadow, possibly with the twisted tree, known as the Scadutree.