DCNU Superman vs Thorbuster Ironman

Who wins this fight ?

Unless Tony has some really amped up speeds in the Thorbuster armor, Superman can whack on him all day without worry.

Supes, Thor buster was built to combat Thor, (obviously) its not able to combat superman efficiently or really at all

It was created to fight Thor and Thor beat it. Even if the armor could do serious damage to superman (via magical power source) he is to fast for the armor to be fully effective and tony will loose.