Iron Man vs Doc Samson
Old School Samson isn't on the same level as Hulk. I can't see Stark having TOO much of a problem taking to the air, staying out of reach, and just blasting away until the cows come home and Samson folds.
Current Samson...
I'm honestly unsure that Stark has the firepower necessary to put down Sasquatch Samson. Which means he tires/runs out of energy, eventually gets grabbed, and that's all she wrote.
Why are we here?
"Superboy Prime (the yelling guy if he needs clarification)..." - Postmania
"...dropping an orca whale made of fire on your enemies is a pretty strong opening move." - Nik
"Why throw punches when you can be making everyone around you sterile mutant corpses?" - Pendaran, regarding Dr. Fate