I think I read somewhere, although I have no idea where the information came from, that as the countdown....er, counts down....more of the background will be filled in. It could be that they're also going to raise the volume of the music as time passes.
Some people have pointed out that Tomomi Kobayashi, the character designer for Romancing SaGa through Unlimited SaGa*, announced recently on her blog that she did some work for Square Enix. There's been some confusion over this issue, and naturally the best place to go when there's confusion over an issue is The Magic Box:
Square Enix opened a new website which has a countdown to reveal a new game, which is rumored to be Romancing SaGa 4, because the designer Tomomi Kobayashi mentioned he is working on a new game for the first time in 10 years, and he is responsible for the SaGa series.
This is very accurate information, except for the fact that Kobayashi is female, isn't a designer in the "responsible for the series" sense and that "first time in ten years" bit is utterly ridiculous, given she worked on Unlimited SaGa in 2002.
By running the blog through excite.co.jp's machine translator (powered by BizLingo, etc), I came to the much more sensible translation that she actually went into the office at 10 AM, and this is the first time she's worked with Square since they became Square Enix. The last major game she works on seems to have been Granado Espanada. Also, she shares her name with a 17-year old gravure idol.
*or, as Squarehaven wonderfully puts it, "Tomomi Kobayashi is a videogame illustrator. She was the main character for the Romancing SaGa and SaGa Frontier series."