If I am not mistaken, this was the first Marvel film. Nothing of the big story/stories here. Just the story of weapons manufacturer and playboy Tony Stark who finds out that not just the ‘good guys’ have his weapons. He decides his company needs change.
Stark was abducted by terrorists. To escape, he builds an iron suit. Back home he decides to use that idea to make a more advanced version of that suit, which becomes his fighting and flying machine that makes him Iron Man.
Within his own company Stark turns out to have enemies as well, especially when he wants to steer his company into another direction. That adversary builds a similar suit to fight Stark.
“Iron Man” is a more typical action film than the other Marvel films that I saw so far. There is also more humor in it. It is amusing, but tells me little about the ‘Marvelverse’, safe -of course- the birth of Iron Man. But you have to start somewhere.