Reminds me of the sillyness of a DEATH BATTLE!!!!!
I'm not going to debate a lot but most people agree Superman and Thor are about equal, and I do believe the fight could go either way since Thor is a better fighter, uses magic, and doesn't hold back like the ever so gentle man of steel. As for Cap, if he's Lord Marvel then Thor stands no chance. Plus there's also Darkseid who I know for sure would beat Thor.