i still firmly believe that an ork kart game would be the genuinely fantastic breakthrough 40k games have needed since dawn of war. a combination of twisted metal, mario kart and penny racers
>choose a tribe when you're creating your character, which may result in a bonus to speed, armour, give you ork boarding parties who scuttle around on the outside of your car and jump onto enemies, whatever
>haul ass around a racetrack in your orkmobile
>destroy opponents' cars to take pieces as scrap, which you can then add to your own orkmobile to increase offensive capabilities, armour, paint it red to increase speed etc
>instead of moving from the pisspipe cup to the shithole cup or whatever, you move from planet to planet as the elite racing division of your particular ork tribe's war party, until you end up busting sick nasty burnouts on terra as the orks topple the imperium of man