>>96152824
So theres abit of lore there

> Never has anywhere in any 40k fluff had the chaos gods be the creators of the universe who created the Warp and real space.

Theres a lore exerpt from Black crusade which has some worshippers believing they do

>So the worshippers would see the chaos gods as the latest generation of gods who usurped the older gods who did create reality, like in ancient greek polytheism.

there are mentions of a titanomachy prior to chaos in TEATD and in gotrek and felix they talk about older gods but we do have a creatrion myth for warhammer in realms of sorcery 2e