The Wii U lives on in spirit

During Nintendo's Treehouse Live segment for Luigi's Mansion 3, one of the developers on-stage talked about the various new moves that Luigi has in the game. Apparently some of those moves came from a prototype test that was worked on for the Wii U. It appears Luigi's Mansion 3 was originally planned for Wii U at one point, but obviously that didn't pan out.

Also worth noting, just incase you didn't catch this in the fact sheet earlier, Luigi's Mansion 3 is being handled by Next Level Games.