It includes Class 9 classification, which covers video games programs, electronic games, downloadable electronic game programs, and ROM cartridge storage for video game software (among other items).
Japanese Nintendo states that the trademark can be used in many different products:
The last Animal Crossing game Nintendo released was Animal Crossing: Pocket Camp for mobile devices. Prior to that, it was Animal Crossing: New Leaf for Nintendo 3DS.
Most publishers do this to refresh their trademarks so that other companies do not get the rights to that name. While this trademark application does not necessarily mean a new game is incoming, it shows that Nintendo is updating their properties for the future. That is promising for Nintendo and all their brands.
Stay tuned to GameSkinny for more information as it develops.