Wow, am I glad I checked out of WH Fantasy when I still thought the storyline was cool
Maybe they learned their lesson and that's why 40k has ground to a halt in terms of the story.
IIRC 40k's on the verge of having the same thing happen to them, since in the last Black Crusade Abbadon got a foothold on Cadia. GW then realized that because they made Chaos so OP that even that would allow them to near-effortlessly steamroll to Terra and kill the Emperor for good, so they froze the timeline.
I dunno what's happening with Fantasy - though at least some Lizardmen escaped in their temple spaceships, so that's cool.