What if someone that took the Unisane were at a super-nexus point at the time of the Wave? Or what if they were at such a point when the Wave hit, never took the Unisane but were exposed to the massive energy burst of P.P.E.? The odds are against it, but they look undead and could be as intelligent as any Thinker. But they probably couldn't control the other zombies, has so much P.P.E. they'd be like walking ley lines and nexus points to attract them to it! Looking dead, shooting fire from its hands, the zombies would hunger for it, the living would most likely be freaked out by it, even with its power it would be a zombie magnet! Neither living nor one of the horde, a pariah not accepted by either. These could make or break the scales in such a conflict. Would the death cults see them as potential allies or secret weapons? Or the most powerful enemies to be eliminated, or at least wrangled to attempt to tap into their massive energy stores to empower Brulyx?
Of course, it's probably too extreme to be allowed in most games. But it IS an interesting possibility, especially for crossovers with worlds used to superhumans. I was toying around with the idea of bringing one in for my party to encounter, obsessed with Disturbed's music, and calling itself Sickness.
Of course, I want to run a traditional game, but my current campaign might be good to introduce it.
... Brubs 
?
...."SMILE YOU S.O.B"....