There is no peace amongst the stars.
Experience the brutal fusion of galactic strategy and grimdark warfare in Total War: Warhammer 40,000. Take command of iconic factions, customise your war machine, and engage in devastating battles as you carve a bloody warpath across the stars.
They revealed 2 factions, Space Marines and Orks



The naval battles in the few previous games they had them were notoriously bad to where they made them exclusively auto resolve in Three Kingdoms. So I’m not holding my breath there for anything more than maybe “siege” type battles that take place in the ship interiors.
I’m maybe in the minority here but I liked naval battles in (mid-game) FOTS on account of having much more to work with than past games. Warhammer 40K does offer much more flexibility in how to implement them so you aren’t just a passive observer hoping your floating bricks don’t spontaneously combust.