Nintendo Co., Ltd. have recently applied for four new videogame trademarks in Japan. These include; Golden Sun, Super Mario Sluggers, Wrecking Crew and Rhythm Heaven. More often than not, the gaming giant reregister the trademarks to keep them up to date. However, there is also the possibility that Nintendo might be working on a couple of projects that might require the trademarks, potentially being new games or rerelasing older games on current gen consoles.
Source: Japanese Nintendo