Eternal Bloodlust (DOOM ETERNAL x RWBY)

(Takes place after the Events of Doom Eternal, so if you haven't played the game, or seen a complete playthrough, I strongly recommend you do. I'm also unsure of ships at this point if I include them at all. I mean, eons-old demon-killing machine + teenage girls. It doesn't seem too promising as of right now. If I change my mind, I'll let you all know.)
It was over. The Khan Makyr was dead, the Icon of Sin defeated, and the Hell invasion of Earth was stopped. As William Blazkowicz returned to his fortress, he set down his weapons, wondering what purpose he had. Suddenly, VEGA detects a foreign signature back on Earth. Returning to the surface, The Slayer comes across a curious creature. A black body with jagged, bone-like structures jutting out all over its body. Feasting on the corpse of an Imp. The slayer watches, as the creature notices his presence, and begins to growl at him. It leaps through a portal and disappears. The slayer follows in its wake and comes out in a strange land.