Minecraft isn't all that trademarkable. They don't own the rights to building blocks and making worlds. Heck, the game itself is almost a ripoff of Lego. It's one of the biggest flaws of MS buying Mojang, that the game itself is not all that special to make. It's the inspiration of the users that is the real treasure.
Regardless, I'm sure this clone will hardly have any impact at all.








