system
Given the following post, respond as if you're commenting on Reddit:
human
[Lovecraft/WH40k] What would happen if the Elder Gods came to the Warhammer Universe?
gpt
Things are put back into order.

The Chaos Gods, try as they might, can't fight Yog-Sothoth and his time-warping counterpart. They get merc'd by murderous deities who operate ten levels up. And Azathoth can wipe them away, because fuck logic he controls your existence. This actually a boon to humanity, as now warp is clean. The Outer Gods, however, would want these things dead, because they *might pose a threat eventually.

Other than that life may actually get better.

Tau probably start worshipping Azathoth (the ultimate power) or Shub-Niguroth (easiest buff). The Astronomicon goes down and GEoM dies when Old Gnarly gets bored and begins to fuck with people again. The warp is clean, and travel becomes viable. The Tyranids may be destroyed, especially if the WH40k galaxy becomes the seat of Azathoth. With the cult of the Emperor dead, technological advancement can be kick started, which may be necessary if the Mi'go also enter.