Those are indeed interesting ideas, and I sympathize with them. Superintelligent aliens wouldn't exactly be gods, though, although their technology would seem magical to lesser creatures (see my article below). Even if all-powerful aliens create universes, this wouldn't explain the ultimate origin of being unless some life form were logically prior to nature, which would make that life divine in a supernatural sense, taking us back to theism. Atheists needn't deny the existence of godlike races. On the contrary, as naturalists, most atheists would be intrigued by that sci-fi concept.
I argue for a pantheistic interpretation of naturalism, and I combine transhumanism with existentialism, so I'm open to the possibility that nature evolves into something virtually supernatural and "divine," as in fully humanized. I've included some more relevant links below, if you're interested.
