Nintendo has filed a fifth extension for the Eternal Darkness IP.
That begs the question: what does the trademark update mean? Well, it could be nothing at all. Given the state of Silicon Knights at the moment, the studio would unlikely be making a new entry in the franchise. The only other way Nintendo could be revisiting Eternal Darkness is if it handed off the IP for another developer… which would also be unlikely at this point.
And so this could simply be a standard trademark move for Nintendo.