Composing under the pseudonym "Ogeretsu Kun," Tateishi's works helped define the 8-bit era, and his Mega Man 2 soundtrack is particularly memorable. If you want to sample Tateishi's creations (assuming that they aren't running in a near-constant loop inside your brain already), Wily Stage 1 is a good place to start. Air Man's a classic, too. I'm all about Bubble Man, personally.
The Kickstarter project for Mighty No. 9 recently crested $3 million in pledges, and has entered its final 48 hours. In addition to previously announced releases for the PlayStation 3, Xbox 360, Wii U, PC, and Mac, Mighty No. 9 will also hit the Xbox One and PlayStation 4 if funding reaches $3.3 million by the campaign's conclusion.