Re: MYTHIC HERO: What Do *You* Want To See?
I'll second those who think that there's no need to writeup an omnipotent, omniscient being, but that angels, demons, and other of the lesser beings would be good to have. I think the potential for offense turns on whether one represents the material charitably or not. Just as a reminder, there were a number of writeups for some of this kind of material in PA Hero, and I think that was generally well-done. It could be updated and/or revised for wider use in other Hero settings without much trouble. I can think of some very cool Champions adventures flowing from the unleashing of the Four Horsemen and the periodic aid of (Arch)angels in an attempt to put those monsters to rest.
I'd also second (and hope you're still considering) the need for something like god/demigod templates so people can build their own pantheons, or add things to pantheons in the book. ("There was a hidden god whom the other gods would not name!") Servants of the gods (e.g., valkyries, angels) would be incredibly helpful as both templates and creatures. Having even a few of these in each pantheon would open up lots of campaign possibilities!