Re: the poo-poohing of the infinitely powerful/'Wrath Of God' notion- sorry, but the The Spectre (as a solo feature; no JLA/JSA showings), is a horror concept through and through. And 'Wrath Of God, etc.' as a take just plain makes for inherently better, more compelling horror. But 'superhero ghost' as a premise? Not so much. In practice, it seems like it'd ultimately slip into something akin to 'less fun Scooby Doo.'
I recall a chat with Steve Bissette a long time ago where he said he felt you really need a feeling of helplessness somewhere to do horror violence properly (as opposed to the inherent power-fantasy of superhero-related violence). And some poor wretch who gets all up in the shit of the literal Wrath Of God seems like a scenario that would fit the bill...