http://www.giantbomb.com/activision/65-78/ and http://www.giantbomb.com/activision-blizzard-inc/65-6397/ should be combined.
There's no consistency to which gets chosen to be the publisher. The Activision page is more current and still has new games like the upcoming Bungie title and Black Ops 2. The Activision Blizzard page has a random, much smaller, collection of games. I think the two should be combined into the main Activision page to reduce confusion.