Blizzard Entertainment sends word that their next product announcement will take
place Friday, September 20 during this year's Tokyo Game Show. There are no
further details about the planned announcement other that it will involve
back-to-back press conferences, but this should provide fuel for some
interesting speculation, since the TGS is primarily focused on console games,
though Blizzard has shown off PC offerings at the show in the past.
I'm guessing... Warcraft 3 expansion and a new starcraft game. I originally guessed that thew new SC game would be in the strategy genre, but I also seem to remember something about a FPS (as mentioned below).