Laminator_X
Once & Future KMC Hawkeye
The Reigning of Thor Upon the Earth is/was/will be a future timeline that might have become Earth-616's future, but was forstalled/diverged when King Thor himself saw that he had ruled poorly and travelled back in time to turn his younger self from that path. King Thor had brought Asgaurd to Earth to help solve Midgaurds problems, but then siezed power after the world's governments nuked him and assaulted his city. Relying heavily on Loki and the Enchantress for support, his well-intentionned reign gradually became oppressive and tyrannical in spite of it's noble goals. Things had gotten so bad that Thor himself could not personally wield Mjolnir (unworthy), and allowed it to be thought lost. A combination of his idealistic son Magni recovering Mjolnir, a confrontation with Desak, and discovering the extent of Loki's twisting of his ideals brought Thor to his senses and returned him to the path of ritiousness.
What's interesting is that Odin himself had forseen this future, and had silenced Zarko the Tomorrow Man when he came back in time to try to stop it as well.
Oh, and KT woul handle the Juggernaut just fine too. Step one: block flow of power from the Crimson Cosmos to Cain. Step two: win easily. Or just send him somewhere annoying. That's good too.