What mecha would he pilot? He's already got the power armor on so he can withstand the harshest of piloting conditions.
He wouldn't, he'd just macronize and then pilot an even bigger version of his Iron Man armor.
Although it'd be fun to see him wind up in the Getterverse and replace his arc-reactor with a getter-reactor, then team up with Hayato and/or Saotome and go to town on an Iron-Getter.
phoenix buster armor is basically just a mech, as is the hulkbuster mark 2.
there's also the various iron man transformers and the megamorphs (all built by iron man in the comic) and in earth X he builds an entire city armor.
also iron man six from the ultimate universe, but that's more of a mobile armor/gunship.
yeah it was actually pretty sweet
>Crossovers you'll never get.
>You will never get to see Iron Getter 1, or Iron Empreror.
This is suffering,