Actually this has been done before. And like then everyone went for tony stark when John henry fights superman class villians. John henry armor has a lot of alien tech there is not a need for upgrade. His armor is superior to iron man in everyway. But of course steel goes down because iron man is so cool.
of course he wins. Cyborg superman, mettallo, fenris, general eiling,...He generally helps superman now when he is fighting something that is insurmountable. All those armor that tony has won't last 5 minutes against steel in the aegis armor. Everyone who reads know this. Without his armor he is a very strong fighter, he took on luthors' bodyguards hope and mercy. Iron man does have an impressive resume', but as a warrior he is overrated. He has some impressive losses as well. To some weak characters.
Asgardian Armor: The huge suit was powered by a reactor utilizing an enchanted element, a super-dense material, an unknown element of unknown origin that was given to Stark by Thor (who gave the enchanted jewel fragment to Stark with the hope that he might turn it into an energy source that would serve humankind. Stark turned it into a weapon that he then turned on a friend). It may have been a piece of a meteor or it may have held the enchantment of Odin. All we know for certain is that it was energized by Thor himself, and when harnessed by the reactor, it allowed the armor to tap into the same energy field Thor himself does.While wearing the suit, Iron Man was able to drop Thor with little exertion since the armor channelled the same power that gives Thor's hammer its strength. Beyond that brute strength, in this armor Iron Man could absorb Thor's thunderous blasts, channel it through his suit matrix and shoot it back.
Arnaments: Enchanted repulsor
This armor won't last 5 minutes? I think it'll last longer than that. He doesn't even have the aegis armor, didn't he leave it on Apokolips? Bring up the names of Steel's other armors he's created that'll stand a chance against current Iron Man armor.