According to Dengeki Online, a special movie of Yu-Gi-Oh!
will be produced for the 10th anniversary of the series. The movie features the main characters of the three TV series; Mutou Yuugi
("Yu-Gi-Oh! Duel Monsters
"), Yuki, Judai
("Yu-Gi-Oh! Duel Monsters GX
") and Fudou Yusei
"). It will be shown at special events to be held in Japan.
Yu Gi Oh! 10th Anniversary official website
Updated on Sep 18th
According to Weekly Shounen Jump, the join anime is a 3D anime movie titled "10th Anniversary Gekijouban Yu Gi Oh! ~Chou Yuugou! Toki wo Koeta Kizuna~". It will be premiered in January 2010.
Source: Scan of WSJ