Poll
63%
38%
I reckon Supes and MM.
With Supes weakness to Thor's lightning, MM would have to distract whilst Supes crushes Hulk.
Then they team up on Thor.
Any delays in this fight would result in the DC guys getting beaten as:
a) Hulk would get strong enough to do some damage.
b) Thor will have more of a chance to summon a portal/mystical lightning to hit Superman with.