According to the diary on their website, Studio Ghibli's next feature film will be released in 2010.
This is to be expected, and if history is any judge, the film will be officially unveiled late in the year. Hopefully, the first teaser trailer will be unveiled as well.
The mystery, of course, should keep Ghibl Freaks everywhere busy: who is the director? Will it be Isao Takahata, whose return to the director's chair after a decade-long retirement is greatly anticipated? Or will it be Goro Miyazaki, who must prove himself as a film director with his sophmore effort, and properly earn his father's throne? We don't know yet, but the answers are coming soon enough.