This needs to happen. But not from any of the "usual suspects."
It needs to be a game on the Wii U from Intelligent Systems and it needs to star Mallo from PushMo/CrashMo.
They could call it "BuildMo" or "BeMo" or "MoWorld."
I dunno. Just.. those games are already about building and solving puzzles. Why not add an interesting twist to it? It's a 3D world with full 3D movement. The various 'Mo's have different properties, weights, and so forth. You'd be building 3D tanagrams or puzzles of your own by building 'Mo's out of "MoParts." MoParts would be various types of minerals. You mold them into special parts with molds that are buried in the ground and need to be found. You color them by growing flowers that you harvest for dyes.
Also, combat would be fending off things that want to steal the 'Mo's from your amusement park. Or things that would hurt your MoParts. There are giant beetles that want to eat your flowers. There are birds that carry off your minerals. Rabbits that eat your flowers. Naughty kids that try to take your 'Mo's or minerals, requiring you to catch them and carry them out of your park. Now, some of the kids in the parks will pay you for constructing cool things. You can use those to buy special minerals from that old Grandpa guy.
You'd have things you had to build to put together your park, but once you complete those objectives, you unlock a mode where you would be free to build whatever you wanted. You could also design custom 'Mo's that you swap via the MiiVerse or via QR codes. The idea is to build an amusement place, 'Mo' by 'Mo,'
Nintendo is the best equipped for this, I think. Imagine decorating your custom 'Mo's on the Game Pad, then figuring out what parts you'll need to make those.'Mo's a reality.
I may have over thought this.