because I am too tired to argue, just a quick summary:
when I planned my plot-arch, I primarily wanted to avoid players being uninvolved. This is why I very actively latched unto already existing structures. The void being basicaly being a place of the mysterious unknown, that however was through mutual destruction interlocked with creation in a hostile way was an obvious part, as it was very easy to adapt my lore to. Rag was informed and discussed with, and it was resolved that the sultanes existing is fine, their agenda is fine, that they were in no way rulers of the void, but more or less just a faction, and not even a particularly big one. Rag explained that Void would basicaly be too apathetic to actually do something about them, as was Caes.
Next, I wanted to get players involved, first one being PN, with Hilda and her mysterious backstory. I asked him if he already had a plan for Hilda, and he said no, so I offered him involvement, but without any spoilers. He was interested to see what I had to offer and agreed. Next I went to Sanure, because Sen was in nature so similar to Amazeroth that I simply could not resist. I asked if he had a plan about Sens backstory and AT THAT TIME, indeed there was none. I again offered an involvement, but again, with no spoilers. AT THAT TIME, Sanure reacted like PN, very interested in what I had to offer. Both Hilda and Sen were supposed to be in the dark about the reveal, so I did not indulge any spoilers to any of them, and for PN, it worked like planned, giving Hilda a lot of character development and involvement in the events. The problem with Sanure was that while Hildas reveal could basicaly happen very soon, I didn't want to reveal Sens backstory until the actual beginning of the plot, and the very, very long plot cue at that time kinda let that sink into obscurity. Eventually, Sanure got his own ideas about Sen backstory, and lost any interest into what I had offered back then. Sadly I never actually got a message to cancel the involvement, and went through with it like I actually planned.
And I still think, it does not nessecarily contradict Sens now cannon backstory, with her being some sort of legion-thing, demon patchwork hivemind. At a point in the past, Amazeroth, with the goal to eventually tempt a powerful enough sorcerer (Alucard) to reactivate the nexus serpent, and artifact from the war of the first days, he split a small part of himself, mostly as an experiment, into creation, to write the daimonicon, which included instructions on how to summon stuff from the void, as well as the task to gather knowledge about creation and make it ready for amazeroth to consume it. That part, as a way to avoid destruction through creation, adapted to it, leading to a loss of self-actualisation and memory, a bit of creation and void essence that eventually became a demon, with the ability to absorb knowledge.
With Sen being made of dozens of demons, there is nothing that sais that not one of these was the carrier of amazeroths essence.
Anyway, jump back in time, after Rags, Pns and SAanures approval, I dumped a fuckton of lore and plans of Elf, who at that time, probably underestimated the scale of my plot, thinking (probably?) it to be the standard thing, a single big fight against 12 enemies, followed by some cutscenes and done. So he approved readily. Hah, he was even angry at me, because he TOO had plans about Sen, and her being an ancient god of knowledge. Took a bit of convincing to stop him from going apotheosis on the party.
Further discussions involved Projeck and the whole Araceli thing, but while it seemed promising at the start, Projeck is not really letting through enough information about what Araceli actually wants besides being Ashleys bane, so the common planning kinda died down. So far, the Sultanes are keeping an eye on her as a promising candidate for the 13th sultane (one being added every harvested creation), for her sheer power and void affinity, but she appears to be a shakey candidate, as new ones turn up.