In the PC game industry there are really only two types of games; those that are announced and those that are being developed currently in secret. These titles are what we are calling "black ops games". These are the titles that we know are in development but at the moment there's very little info on what these titles are even like, much less any word on a release date.
BigDownload has seen an example of this type of game earlier this week when it was revealed that Ensemble Studios was working on a planned MMO based on the Halo franchise. That game was canceled before the title was even announced and history is full of similar games that were being worked on but were canceled before they were officially revealed (of course there's also been a ton of games that were fully revealed but then canceled before their planned release...but that's another feature story)