A Scan from the Japanese Magazine
A magazine in Japon recently featured an article about the sequel to Dragonball Origins on the Nintendo DS. It carries on where the story left off in the first game and focuses around the Red Ribbon story arc. The game is subtitled DragonBall DS 2 Totsugeki! Reddo Ribon Gun ("DragonBall DS 2: Charge! Red Ribbon Army"), and it is due out in Japon on 11 February 2010.
A U.S. ou European release hasn't been confirmed and the first game wasn't extremely popular. I wouldn't worry too much about that, they rarely pull sequels anymore and namco bandai should release it for the fans anyway. If they were to release it overseas, at an educated guess it may come out Summer 2010, so just keep tight.