In 2007, Capcom teamed up with Gakken publishing to create an educational comic called "Secrets of Video Games", an item that would help young children gain an understanding of the ins and outs of the video game industry. This being a Capcom sponsored product, you'd expect a Rockman cameo of some sort, right? Right!
While exploring the showroom floor of an industry trade show, the main cast takes a group photo with Rockman, or a dude dressed like Rockman. Either way, it's Rockman.
Other Capcom famous characters are said to make brief cameos too, some more prominent than others.
Many thanks to rockmega for the scan!