Follow-up comment from Nintendo alleviates worries of the studio’s closing.
Shack News recently reported that three integral members of Retro Studios, the company responsible for the Metroid Prime trilogy, were escorted off the studio’s premises. The three members - design director Mark Pacini, art director Todd Keller, and principal technology engineer Jack Matthews - left the studio for unknown reasons, but the popular assumption is that the trio will form a new development studio together.
As to any rumors about the company’s closure, Nintendo responded to Computer and Video Games that "we still continue to work alongside the team at Retro and no official announcements as to its status have been made".
While this doesn’t deny Retro’s potential closure, it doesn’t confirm it either. They are supposedly currently at work on a new Wii game.