Jesus wept Nintendo, relax mate.
It's called Metroid: Samus Returns. It's a remake of Metroid II. It's being worked on by MercurySteam and it looks like this in action:
— Nibel (@Nibellion) June 13, 2017
Absolutely, utterly insane to think that Nintendo didn't drop this news in their presentation. Instead they casually had Reggie Fils-Aime announce it during their annual Treehouse sessions on YouTube.
Big day for Nintendo.