It has been revealed by Naka himself recently that he visited the Mazra Animation studios. The animators behind the Sonic Unleashed CGI scenes and Generations CGI ads. On both Twitter and Facebook he makes comments that sound along the lines that there may be a Sonic animated movie in the works.
Marza Animation Planet is made up of members from VE R&D (http://sega.jp/corp/saiyo/csjob/ve.shtml), which is a division he had a hand in creating. It looks like they’re working on a Sonic movie. Their offices seem nice, and they have a screening room / theatre there.
Whether it may just be some CGI for an upcoming game or a full blown movie remains to be seen. Sega has not made any comment on the matter so far.Ad: