https://www.polygon.com/2018/9/13/17857440/luigis-mansion-3-nintendo-switch-teaser

Luigi’s Mansion 3 is a new series in Luigi’s flagship franchise, and it’s coming to Nintendo Switch. A very short teaser opened up today’s Nintendo Direct presentation, showing Luigi stalking through yet another creepy, probably haunted house against his best judgment.

You may have thought, “Whatever, this is probably that Luigi’s Mansion port for Nintendo 3DS, out Oct. 12.” If you did — and admittedly, that includes us! — then nope, you were wrong. This is a new game, and it’s coming back to consoles for the first time since the original Nintendo GameCube title.