Rumor: Metroid Prime 4 Developed By Bandai Namco/Star Wars 1313 Studio + Ridge Racer 8 Switch Exclusive

[Miyamotoo]

[UPDATE: Since publication I've heard Bandai Namco's Japan studio is also working on the project, with the intention it will now take the lead on its development while Singapore moves to focus on another Switch game]

http://www.eurogamer.net/articles/2018-02-08-yes-namco-bandai-is-working-on-metroid-prime-4

So I guess that second game is Ridge Racer.