I read an article today on pcgamesn.com that Frontier have acquired a license from GW to make an RTS game based on Age of Sigmar. Says it's due at the end of financial year 2023. Thought i'd share!
Edit: On reflection, as someone who has loved both Elite and Warhammer (40k in particular) since the 80's and not being a big fan of the RTS games like Dawn of War, what I would one day love to see from a collaboration between Frontier and GW would be a Rogue Trader type space game, in a 40k themed open galaxy like Elite's. I'm having visions of visiting Space Marine Chapter worlds, trading between different systems, combat with Xeno's, heretics etc! Maybe one day...!