- Nintendo Land
- New Super Mario Bros. U
- Mario Kart U
- 3D Mario
- Wii U Fit
- Super Smash Bros. U
Those are the first party titles I see reaching 10 million copies. As for third parties:
- Just Dance
- Sports Connection
...and that's about it, at the moment.
If Nintendo decides to release a new Wii Sports title, it would replace Sports Connection on the list. Still, these are merely the nominees. I only expect about five of them to sell 10 million copies..