Much like Kameo: Elements of Power, Fable 2 ships without online co-op mode on day-one. However, Kameo didn’t promise the co-op mode prior to the games release, or talk about it in their presentations and hype machine conferences.
How does that happen? It’s easy to promise a feature but words do not make games true. More than likely the online co-op was a bit more complicated or had some bugs that needed to be shaken out prior to shipping. Microsoft is talking about releasing a patch for the new co-op play on the first week or so of the game release.
There are two options: ship a product that’s buggy and deal with the online PR nightmare with bugs and day-one patches, or, ship it without the feature and promise it early in the launch phase of the game. Once the code is complete, game software has to go through the packing, duplication and shipping phase. A lot of last minute testing can get done in the time it takes to produce the boxed product.
Hopefully Microsoft is doing some last minute testing to make a more reliable presentation of online co-op which everyone can use. However if it releases with a bunch of bugs…
(Thanks, GameSpot)

It makes sense for Sony to try to push themselves away from being classified with the Wii console because it makes them look bad. We’re all equal gamers here, there is no need to break into more sub-categories when only three consoles vying for top spot. Many folks (including us) criticize the slow adoption rate of Wii games, yet they steal top software sales spots as well.
UPDATE:
http://www.gamestooge.com/2008/09/30/molyneux-fable-ii-will-have-online-co-op-at-launch/
UPDATE:
http://www.gamestooge.com/2008/09/30/molyneux-fable-ii-will-have-online-co-op-at-launch/