As far back as 2009, the talks was that Studio Ghibli co-founder Isao Takahata's (Grave of the Fireflies, Pomo Poko) first movie since his water color style adaptation of family comic strip My Neighbors the Yamadas would be a retelling of 10th century Japanese folktale Taketori Monogatari (The Tale of the Bamboo Cutter) - the story of moon princess Kaguya-hime, discovered as a baby inside the stalk of a glowing bamboo plant. The story figured into many other anime, from Oh! Edo Rocket to to Leiji Matsumoto's Queen Millennia to Sailor Moon.
In November 2011, Studio Ghibli's site posted job listings to recruit assistant directors and production assistants for an Isao Takahata directed movie, scheduled to be completed in summer 2013.
While there's been little hard news, the time frame and project seem to be lining up to suggest that a Bamboo Cutter from Ghibli movie might be happening soon.
This week, the studio's distributor, Toho registered the KAGUYAHIME-MONOGATARI.JP domain.