Team Ninja, Tecmo, and Nintendo kept Metroid: Other M well hidden from the public eye. Even Koei, which merged with Tecmo, wasn't aware the game was in development.
While the merger was in process Tecmo was not allowed to disclose they were working on Metroid: Other M. That's how secretive Nintendo is about their first party projects! Since Tecmo is so close to Nintendo you would think Nintendo would release Fatal Frame IV overseas, but a representative from Tecmo reiterated Fatal Frame IV will not be released in North America or Europe.
Team Ninja grew slightly too. Usually, Team Ninja consists of 80-85 people. Right now there are about 100 people in Team Ninja. Metroid: Other M is slated for release in 2010.