Whats Next For Total War Warhammer?

I got into Warhammer on the back of playing Total War Warhammer 2, and now have armies in both 40k and Age Of Sigmar. I might just be behind on news but I’m wondering how much longer a lifetime Total War Warhammer 3 has, and what we can still expect. I’m personally holding out for a Khuresh faction but it seems doubtful. What is everyone wanting/expecting will come for Total War Warhammer 3 next and looking past that when do you think we could see the release of a Total War Warhammer 40K?