Two lightning/strength based beings fighting Thor the god of Thunder? Also since not specified, if assuming this is a fight to the death, neither can KO or kill hulk. I'm sure there's a fanboy who can supply scans of Hulk taking tons of lightning.
Earth Prime in the movie is the world on which the first choice was ever made, thus creating the multiverse. It isn't necessarily our world. In comics it's the original home of Superboy Prime and other characters.
@goddamnironman: I kind of hope there isn't an iron man 5. I'm on the fence about a 4. As much as I liked all three of these, they run the risk of ruining the series reputation each time there's a sequel beyond 3.