That . . . is the most badass rendition of Thor I've ever seen, particularly with the care you took to include more of his mythological roots in your design of him. The beard is particularly nice and I'm happy the Avengers film universe's Thor has one, too. As for him being blond, Marvel explained it as the "cycles" of reincarnation causing the Asgardians to take on new forms with each passing cycle, which is why Thor has blond hair in the comics when his original mythological self had red hair.
And Iron Man . . . is looking awesome as hell. I absolutely adore the design you gave his armor, mixing the 90s version with the more classic and 2000s-era models. Great work from a great artist.