Seriously Epic Fandom Crossover Of Doom... (Erotic Potential Somewhat Limited.)

So, one of the other players in the 40k game, (who asked to remain semi-anonymous,) came to me with an Idea I just HAD to share.

One Punch Man VS Warhammer 40K...

If you look at One Punch Man it quickly becomes clear that his world isn't actually Earth, even though they call it that. For one thing, EVERYONE speaks Japanese, even halfway across the planet. For another, the geography is all wrong. And let's not even get started on there being snakes the size of cars.

Here's where things get Interesting... Other than the total absence of chaos iconography and the other staples of the genre, which, coincidentally, are copyrighted, what we see there would not be at ALLL out of place in a mildly affected demon world, specifically, one being fought over by Khorn, Malal, and Omnisha, chaos goddess of the Dark Mechanicus (sadly, like Malal, no longer canon,) anyone care to guess who Saitama, with his obsession with fighting the strongest imaginable opponents, is an extremely unmutated demon prince of...?