On April 7 at 9:00 a.m. a 1 hour special of Toei's big 3 step in to the Ring of World Martial Arts Tournament to see who is number one 
Quote:
Cast and story for the "Dream 9 Toriko & One Piece & Dragon Ball Z Chō Collaboration Special!!" airing on April 7. Toriko's International Gourmet Organization has sponsored "Tenkaichi Shokuōkai," a merciless race with no rules (and a nod to Dragon Ball Z's Tenkaichi Budōkai tournament). The showdown may determine the strongest of the three franchises' leads: Toriko, Goku, or Luffy.
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The special will feature the following cast of characters:
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Toriko: Toriko, Sunny, Zebra, Coco (the "Four Heavenly King" Gourmet Hunters), Komatsu, Rin, Setsuno
One Piece: Luffy, Nami, Chopper, Sanji, Zoro, Franky, Robin, Usopp
Dragon Ball Z: Goku, Gohan, Goten, Trunks, Kame Sennin, Android No. 18, Vegeta, Piccolo, Krilin, Announcer, Mr. Satan
is this because of the game that is coming out from shonen jump
Yep it's to promote the game.