Out of the blue, Nintendo has dropped a cryptic teaser titled Emio. With the hashtag #WhoIsEmio on X, the Super Mario company also shared a YouTube link leading to a short teaser featuring a man with a paper bag with a smiley face over his head. All of this is encapsulated by eerie music in the backgroundThis has resulted in mass speculation from fans, including everything from a brand-new IP to Nintendo Switch 2 news. Here's what we know so far.What is Emio from Nintendo?The 15-second-ling teaser ends with Japanese text that translates to "smiling man," referring to the masked individual in the footage. There is also a link by Nintendo Japan featuring the creepy man seen in the trailer. Since the URL has "switch" in it, we believe it is a video game project for their current console.It will likely be an IP or project for mature audiences. As such, fan speculation about a new Luigi's Mansion, new Eternal Darkness, and other bizarre theories seems unfounded. Whatever the case is, this is most unusual for the family-friendly company known for titles like Super Mario, Pokemon, and Nintendo Switch Sports.We will keep you updated as the situation unfolds, but that's all we have to go off on for now.