Kojima Teases big news

Upon accessing Kojima Productions' official website, users will be welcomed by an interfering pop up video with a text message in Japanese saying 'Spring Comes to Kojima Productions'. The background tune is Haru ga Kita (Spring Has Come) and the video has a tag title reading 11/07. Might this be a teaser for a huge new IP from Hideo Kojima ? Or will it be another installment in the Metal Gear Franchise?

The teaser can be accessed here