While this information wasn't shared during the western broadcast, it was mentioned by the Nintendo Treehouse team and also in a video featuring Metroid Dread Producer, Yoshio Sakamoto, after the show.
In addition to this, MercurySteam has confirmed it on social media:
During Sakamoto's discussion about this game long in the making, he explained why Nintendo decided to team up with MercurySteam once again:
"We met MercurySteam Entertainment, with whom we co-developed Metroid: Samus Returns for Nintendo 3DS. They're extremely talented. Technically, they're very skilled. They also have great taste. But more than anything, they have an incredible understanding of Metroid games.
"I was confident that teaming up with this wonderful team would finally allow us to bring Metroid Dread to Life. And the result is that we've completed a version of Metroid Dread that even surpasses what we imagined 15 years ago."
So, there you go - MercurySteam is back! Are you glad to see Nintendo has brought them back for this new 2D Metroid game? Have you played its previous game, Metroid: Samus Returns? Tell us down below.