It seems that most Metroid fans were not happy with Metroid Prime: Federation Force. That's a well known fact by now, and many decided to skip over the game when it launched. Instead, they look to the future for the next 'true' installment in the Metroid franchise.
This had lead the gang over at Reddit into the world of domain hunting. They're looking to see what domains Nintendo has registered and active in order to hopefully get a glimpse at something coming down the pipeline. While they haven't found anything major yet, they did happen upon an interesting tidbit.
Metroid Prime: Federation Force used the domain metroidprime.nintendo.com as its internet home, but it's not the only domain Nintendo holds for Metroid. It turns out they also have metroid.nintendo.com registered, but it comes up with an error when you visit. The thing is, when you do a bit of digging, you see that other Nintendo non-existent websites like fzero.nintendo.com spit out a different result.
Long story short, it seems like Nintendo has something attached to metroid.nintendo.com. We don't know if it's just a domain they've registered in order to keep it for use later, or if there's some sort of project in the works that'll be attached to it. On a very basic level, Nintendo has the domain secured when similar domains for other Nintendo brands don't give the same reaction when you resolve names. Food for though, and a tiny morsel for Metroid fans to sustain themselves on.