Nintendo had many systems as part of its VC program in the Nintendo Wii and some like the TurboGrafx 16 and SEGA Genesis left the service when it landed on the Wii U. Now, the TurboGrafx-16 is getting games on the Wii U again with the release of R-Type, New AI, and Bonk. This is the first third party system landing on the Wii U VC service and likely indicates more are on the way. The games are out now on the NA E-Shop.
Source: NeoGaf