Here is something a bit novel....
I got to play a game of Aquanautica Imperials: Battle for the Depths. This is a game of submarine combat set in the warhammer
40K universe.
Basically, it works a bit like the old AI from
FW only with unique units, a different initiative order, depth (instead of height), and a detection mechanic.
Orks vs. Imperials as the game fit into a larger informal campaign. You can read all about it here:
https://bloodandspectacles.blogspot.com/2019/09/battle-report-aquanautica-imperialis.html