I finally finished reading Hickman's Avengers & New Avengers. I'm two issues into Secret Wars now. Can I just see if I understood what was going on correctly?
The Beyonders (Ivory Kings) created life in the multiverse, but they got tired of it, so they decided to destroy all the universes by creating Molecule Man in each reality, who acts as a bomb, when he dies, destroying that reality. They planned to kill them all at once, ending all of reality and life at the same time.
Doom, with the help of Molecule Man, went back in time and created a myth and religion around himself, becoming Rabum Alal in order to kill all the Molecule Men in the other realities. But doing so has caused the incursions.
The Black Swans are his followers, except the one we've seen a lot of in New Avengers, who is a heretic. She dared to enter Doom's presence and didn't like what she saw (do we know what she saw?) so she, along with some others, turned from Doom's path and began sacrificing earths in order to save the universes they were from.
The early death of the multiverse, caused by Doom, alarmed the Beyonders, who sent their map makers out to find out what was going on. They wrote a virus that infected the space between universes, so that any AI that entered there would turn into a map maker and serve them. The Mapmakers find earths where the Black Swans have killed a Molecule man, and they suck it dry of life and resources, then when the next incursion takes place, they send their pawns, the Sidera Maris, to hold the incursion point on the new world until they can mark it, destroy the old world, and then make their way to the new, marked world. (So I guess their whole deal is that they want to figure out what's going on, but they just destroy the earths as they go, because, why not?)
Also, there are the builders, who are apparently the oldest race of each universe and worship the Universe (or at least used to). They feel they have the responsibility over life, since they created it (I think?) They created the alephs and gardiners and abysses to help them shape the universe (creating new life, culling old life that they think has failed), they try to destroy the earth in order to save their universe from the incursions. But they also destroy whatever life they want to if they find it to be unfit. They also monitor the universes from the superflow and create white events to bless races that are about to become important. They turned Kevin Connor into Starbrand.
Finally, there are also the Black Priests, eventually led by Dr Strange, who are just trying to save the multiverse by destroying earths, sort of like the heretic black swans and the builders. But Strange eventually leads them to battle Rabum Alal, and then finds out Rabum Alal is Dr Doom. The two face the Beyonders together and somehow, Doom creates Battleworld and Dr Strange ends up as his Sheriff, who enforces the law and covers up any "schism" so people don't find out what Doom did.
Is that accurate?