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For all Zumba Fitness fans there's good news, Zumba Fitness 2 might come to Kinect in early 2012. Majesco has announced that the sequel for Zumba Fitness for Wii will be launched around Christmas and that it will also be available for another platform in early 2012.
Zumba Fitness 2 for "another-to-be announced platform"
Majesco did not say which will be the other platform to host Zumba Fitness 2. However, it is expected to be Xbox Kinect because of the strong sales. The higher the number of Kinects sold, the higher the chances for big sales for Zumba Fitness 2 as well.
Majesco CEO Jesse Sutton said about Zumba Fitness

We've seen an overwhelming demand for the next iteration of the franchise and I can promise you that Zumba Fitness 2's new and improved features will challenge Zumba enthusiasts and entice new followers to join the party.
Zumba Fitness 2 will feature over 30 new tracks, new dancing styles and environments,  customized workouts and top Zumba instructors Beto, Tanya Beardsley and Gina Grant.

Zumba Fitness

Zumba Fitness Party (a.k.a. Zumba Fitness: Join The Party) on Xbox 360, by 505 Games, Pipeworks Software

Learn and perfect nine different dance styles: Reggaeton, Merengue, Salsa, Cumbia, Hip-Hop, Mambo, Rumba, Flamenco and Calypso.
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VIA: CVG

From 123 Kinect Article: Rumor: Zumba Fitness 2 heading to Kinect