Once again, proof that there are two kinds of comic writers: actual writers, and Mary (or, in this case, Marky) Sues. This isn't Doom's secret fantasy; it's Millar's -- to be evil, kill off his greatest rival, get redeemed, and take the rival's place, including in the bed of said rival's insanely hot wife.
Soooooo... I wonder who Millar perceives his rival to be...?