The Nintendo Direct presentation from Nintendo of Japan brought news of Mario Tennis Open for 3DS, the latest entry in, you know, that series of games about Mario playing tennis. We learned that the sports game will feature online play and Mii customization -- and, most importantly, that it'll be available May 24.
The European translation of the same video informed us that the game will be out on May 25. And now we wait for 9AM EST, and the American Nintendo Direct, for potential news of a stateside release.
Update: Nintendo of America says Mario Tennis Open will arrive in North America on May 20.