I was watching Doctor Strange the other day and I came up with this hypothesis afterwards. I mean he does appear demonic as he is always covered up in flames and his world pretty much resembles hell according to how the bible and modern culture depicts hell to be.
I'm guessing that if this is the case then Sentry must be the God of the Marvel universe. even thought he doesn't appear so holy but he is pretty much the most powerful character in the Marvel universe as he can destroy planets, galaxies and even universes within seconds without him even noticing it. in another source I also heard that he has the strength of a million exploding suns. its also save to say that by now he is the only character to ever fight Hulk in his most powerful form ever yet still dominate him.