Atlus posted a new teaser site which has a scrambled picture and text like "we're hope!" and "for the future of mankind, let's do it!". The game will be revealed on July 24, but I believe we can beat that.
Denpa no Sekai helped crack the mystery by sending a picture an unscrambled picture of the South Pole imploding. Thanks!!
Doing a little more digging I think we got the name of the game and it's a Shin Megami Tensei title. The page's source code hid a file called logo_megami.jpg. The file has been removed, but not before this Japanese blog grabbed it.
It looks like Shin Megami Tensei: Strange Journey is coming out in Japan on October 8…