Shigeru Miyamoto stated the below concerning Metroid on the Wii U:

“With Metroid it’s very easy to imagine some interesting implementation for Wii U. I think that having another screen with the gyro built in really gives you a lot of interesting opportunities for development, and we can bring a lot of our games to life in a completely unique way with that.”

“I feel like the possibilities of the GamePad for Metroid could be really fantastic,” Miyamoto told me at a different point in our conversation. “There’s certainly a lot that you could do there for that game.”

Miyamoto seems to like the idea of having Metroid come to life on the Wii U and he feels the GamePad could make possible some interesting ideas. Miyamoto also brought out that “personally” he wants Star Fox brought to the Wii U most compared to other Nintendo franchises. Miyamoto didn’t confirm that these two games are in development right now for the Wii U, but there is a possibility that both or maybe just one are being worked on. Could Retro Studios be making a Metroid or Star Fox title for the Wii U?

Source: mynintendonews.com, ign.com