Marvel Adventures Spider-Man, Hulk & Iron Man: Triple Threat

In 2009, Marvel released a single-issue team-up starring three of its biggest heroes, written by Paul Tobin with art by Alvin Lee. This one-shot brought together the kid-friendly takes on Spider-Man, the Hulk, and Iron Man from the popular Marvel Adventures line for a fast-paced adventure. It's a neat, self-contained example of the all-ages storytelling that defined that era of Marvel's publishing.