A playtester for Nintendo has leaked multiple images of what looks like some kind of Minecraft-style MMO, where all players work together to develop a whole planet.

Nintendo's lawyers are working overtime, between the Palworld lawsuit, the massive Pokémon hack, and now this. A Nintendo playtester has leaked images of an exciting new project for the Switch.
The leaked content hints at an expansive, multiplayer experience unlike anything seen before from Nintendo. Let's dive in!
Nintendo's world-building MMO looks hugely promising
A playtester for Nintendo has just released a number of images from an unannounced MMO for the Switch. The leaked images are spreading like wildfire, with fans massively excited by how ambitious the project seems.
The overall idea is that each player will be responsible for farming and building up their own small plot of land on a giant planet. With thousands of players doing this side-by-side, an entire world will eventually be created:
In this game, the goal is to work with others to fully "develop" a massive, expansive planet by utilizing creativity and farmed resources. As you progress across the planet you'll discover new lands, enemies and resources that will become essential to your journey.
You have a private zone just for you to develop, called a Beacon Zone, but there are also communal areas outside the Beacon Zones.
As you develop the shared world, you earn "Dev Points", which you can use to increase your character's "Development Level", and thereby unlock new creation tools.
You will also earn "Connex Points" for social activities, which increase your "Connection Level", and provide access to community-related items (no examples given).
The leaked playtest info also mentions User-Generated Content as a key part of the game:
You can make all sorts of different UGC in-game. You can received feedback by sharing the UGC you create with other players.
And to avoid offensive UGC, Nintendo will apparently make users take a test before they can acquire a license to share content with other users.
Many of the original posts that contained the leaked images have now been removed, with Nintendo acting quickly to shut rumors down. At the time of writing (October 21), this video of the leaked info remains online.
Is this the kind of game you would be interested in? And, do you think Nintendo can pull off multiplayer on this scale?