Originally posted by FrothByte
It really depends on the scenario though. If we're thinking exact same scene we saw in that trailer, they were in a pretty tiny room which means IM isn't as maneuverable. OP also states he cannot fly.For IM to utilize his missiles he needs to create distance because he needs time to get those in place. But when Bucky and Cap (who are both far faster on the ground than IM is) are both up in his face whacking him with considerable strength, I doubt he'll have enough time to get his missiles to bear.
Even his repulsor blasts take a split second to charge up and fire, and from what we see in the trailer Cap and Bucky are just all over him that he's unable to take a proper shot.
So we need to figure out how this match starts. Are they at distance? Then IM can unleash his full arsenal. Are they face to face? Then IM probably doesn't get a chance to use his weaponry properly and will need to resort to h2h.
While I agree completely with the scenario being a factor, my main point is that people are jumping to conclusions while not knowing the full context of the actual fight. In the particular scene from the trailer, what stops IM from just going ham, flying out of there and blow the building apart? His friendship (or former friendship) with Cap.