Have just seen the movie and I thought it was awesome. I wouldn't say I'm a huge Marvel fan as some of the movies over the years have been very hit and miss IMO, but this one has it all, capped off with a good balance of humour.
If done right this would make a very popular pin.
May even have the wife's blessing if the pin goes ahead because she loved the movie and I dropped a not so subtle hint about it (she loves Iron Man also). I got a response of "Maybe", rather than a straight out no, that's a big deal because I just can't convince her to get a pin of her own.....yet!

Goes to show how important the theme is to giving others the bug too.