On June 30th, Studio Ghibli's production diary posted the statement "the studio finally sets sail on a long trip". It's known co-founders Hayao Miyazaki and Isao Takahata both have projects in the work, and there's been persistent talk of a Porco Rosso 2: Last Sortie. Ghibli Wiki translated a number of the studio's comments and started piecing together an educated guess on their current focus.
More please. Though I'll admit, the feud between Miyazaki and his son is a bit disappointing.