I take offence to your description of that meta theory. I've never even read the wheel of time to compare it to. It's closer to All You Zombies imo. Although, your second is probably tied to the first. Arthur bore a mortal wound and was taken to Avalon to heal. All 3(or 4 depending on which iteration) of the "queens "helped him get there, even Morgana who was ultimately responsible for his condition by proxy. Lara, Mab and Justine all were part of his getting there, and Nemesis who basically put him there.👀 If your looking for accuracy, the ending isn't going to give it to you necessarily though.
I'm looking forward to finding out the hidden mechanics, the secrets kept intentionally from Dresden at time. Things Jim may or may not include, or may make his own silmarillion version of a backstory to explain?🤷♂️