This site is still the same as it was. It was thought that it was for Versus, but it's still there with that "coming soon" message. It could just be something they forgot about, but... Maybe that mention about another .hack game in development isn't false after all. It wouldn't be the first time a statement has been retracted just to keep things a secret until the producers had a concrete item. I mean, a lot of people thought that LINK would be the end, but here we are with more stuff coming out.
Anyway, this is just me being hopeful.