Barkley on 31 January 2018
Interesting that "Metroid Prime 4" is listed as a temporary title, wonder if they will change it. I imagine if it did change it'd just be Metroid Prime: Subtitle, but perhaps they'll drop the "Prime" part all together...
Also again listing pokemon as "2018 or later" so it COULD still come this year. But they're not sure yet.
