Not sure where the shirt came from.  While Hulk, Spiderman, and Iron Man are all in the Marvel Universe, the kind of operate in different circles.  Spiderman kind of hangs by himself for the most part in NYC.  Iron Man is a corporate/government tool, and the Hulk just runs around wrecking stuff.  In the course of all the Marvel Team Ups everyone has more or less teamed up with everyone, but this seems odd.  

That being said, this shirt itself is pretty cool.  I don't have a lot of green shirts on the site, so if you are planning on wearing something while getting drunk and into St. Patty’s Day shenanigans this might be the shirt for you, especially if you don't want to look like every frat boy loser in a "Kiss me I'm Irish" tee.