I'm not religious in real life at all, so I'm not arguing this out of any bias, but we've had plenty of evidence and even confirmation of the Judeo-Christian God existing, as well as many other gods.
Ive always felt that the one above all is the omnipotent be all end all and then Christianity is based around a very reclusive sky father
Another character we've never seen is the real Satan; after years of bickering over which of Marvel's Hell-lords is the real thing, a recent issue of Journey into Mystery revealed they're all fakes, with some not even believing the real one exists!
Nah, it's just an abstract being that hasn't been defined yet. If a writer wants to use it in a Wolverine mini-series he or she could, and they could also create another being/entity that is more powerful than "the one-above-all" (in which case they'd probably better change the name). It's all make-believe. I like the idea of a Kirby god more than some anonymous abstract entity anyway, so I'll go by that. I'd say on the whole Kirby's done more good in the world than just about any of the heads of the major world religions.
A Fool for the Foom
Bartender: Is he... God?
Mephisto: Oh, you are just so cute. I could eat you up with a spoon. Maybe later. No, he's not God. He's just the biggest kid in all the playgrounds. And if he knows The Principal, he's not exactly chatty about it.
So there you have it. Inference of a "God" in the Marvel Universe as you seem to be looking for, but nothing really to get bothered about.
Your posting style looks like a retarded haiku. - Bronze Badger
Women are beautiful. But we're not here for your goddamn titillation. - junesdisco
Spider-Man and him had a talk
Avatar from What If..? v2 #10: What If Punisher Family Hadn't Been Killed?
Pencils: Rik Levins
Ink: Bob McLeod
Hulk is strongest there is, not God.
Also in the MU there is Hel, Valhalla, Hell, Heaven, the Negative Zone, the Cancerverse, Limbo, Hela, Mephisto, Satan, Son of Satan, Death, The Angel of Death, The Serpant, Thanos, The Void, Ghost Rider's "The Friend aka Jesus", Celestials, Galactus, the Beyonder, the Watcher, Squirrel Girl, Korvac, Odin, The Eternals, Franklin Richards, The Phoenix, etc...Not to mention whoever has ahold of the Cosmic Cube or Infiniy Gems...There really is no difinitive answer to the question. That would be really boring.
But I think generally speaking they've stayed clear of making the judeo-christian god and satan actual comic book characters in the marvel universe.
Though I think the recent Ghost Rider comic went there to some degree ... not 100% sure because I didn't actually read it.
Still, other comic boom companies have doe a lot with biblical characters and themes, so it's probably a whole lot less controversial now that it would have been 2 decades or so ago.