SirCabbage: Activision owns blizzard and LOTS of others, lots of things could come out
Bloodlines, Pharoah (forget ceaser 3 o-o), Starcraft, Warcraft 1-3...
Navagon: Activision doesn't own Blizzard. Vivendi own both. But it's not Vivendi who're on GOG. No Blizzard games for now, unfortunately.
"Blizzard Entertainment, Inc.
Type Subsidiary of Activision Blizzard"
"Activision Blizzard, Inc. (NASDAQ: ATVI) is the American holding company for Activision and Blizzard Entertainment, majority owned by French conglomerate Vivendi SA. The company is the result of a merger between Activision and Vivendi Games, announced on December 2, 2007"
"Merger with Vivendi
In December 2007, it was announced that Activision would merge with Vivendi Games which owns fellow games developer and publisher Blizzard, and the merger would later close in July 2008. The new company is called Activision Blizzard and is headed by Activision's former CEO, Robert Kotick. Vivendi is the biggest shareholder in the new group.[21] The new company is estimated to be worth $18.9 billion, ahead of Electronic Arts who is valued at $14.1 billion."
Obviously its not the best to go via wiki, but according to them, the companies are linked... I know you agreed with that point, but it sounds to me like there is enough of a link for blizard games to be released... only time will tell I suppose