In 2013, Marvel Comics launched Avengers: Heroes Welcome as a one-shot promotional issue (Issue #001). It was a soft relaunch tie-in following the aftermath of Age of Ultron (the comic event, not the film). The physical book featured standard art by Steve McNiven and was given away at select Walmart and Midtown Comics locations. It is not particularly rare—you can find a raw copy on eBay for $5.99.