Potential announcements at BlizzCon:
A) The first official Blizzard branded gaming PC that comes preloaded with WoW and it's two expansions. You'll be able to choose between either an Alliance or Horde themed case.
B) There will be a Milli Vanilli style revelation that Blizzard has in fact been lip syncing in their videos, and that their games have all been developed by two elderly gentlemen. Around the nation, Blizzard Disk Burning events will follow soon after.
C) The first concept art for the other MMO under development at Blizzard will be shown - no other details will be revealed, but the timing of the news will steamroll the LucasArts / BioWare announcement later this month.
D) Blizzard reveals that they are indeed Luke's father, and that they shot JR.
E) The new WoW Underoos will be shown for the first time, and will be available in not only kid sizes, but will be marketed for adults as well. A decade later special reports will be aired on all major news networks detailing the sharp decline in birth rates, marriages and the cancellation of high school proms across the country.
F) Not content with only partial market domination, Blizzard will announce not one, but two new games. First, Starcraft Ghost has risen from the ashes but will now be a FPS that will be available on the 360 and PS3. The second game will be titled Super Murloc Galaxy and will be available on the Wii and DS.
G) None of the above.