It was not a dream, people. Here is inarguable proof that there have been many Mega Man games.
What we've got here is a chart by Capcom community blogger Snow, displaying the grand amount of Mega Man games released by Capcom during the last 23 years.
The horizontal lines represent years. The bunched columns represent lines of Mega Man games. The classic Mega Man games are shown in the left column.
Click through for the full-sized chart, but be warned that one of the reasons I didn't put it in this post (other than because I'm classy) is because it's enormous.
Complete Mega Man Game History [Capcom-Unity.com]