New Metroid Project on the Boil?

A new update has appeared on the Japanese Metroid website that has led some to believe a new project could be on the way. According to a new button that has appeared on the main page, another side-story is on the horizon. The Japanese text featured on the button states "Follow Metroid Prime's history from the perspective of the Space Pirates." Could this be another spin-off from the main Metroid series, just as the Prime games were set between the happenings of the original Metroid and Metroid II? And if so, will it indeed be a new game or just an update to the web-based Metroid manga series?

Considering all of the other pictures on the main page are related to main entries on consoles, it could very well be something special. Could we finally see Metroid Dread appear on the DS? According to Mark Pacini, when he was still working at Retro Studios, he claimed the team's next project was not going to be Metroid-related, but perhaps things have changed.

What are your thoughts on this update? And could it merely be referring to the Play on Wii version of Metroid Prime 2: Echoes?