Microsoft's UK head of gaming and entertainment Stephen McGill said that there was "lots of great stuff" coming in 2009 that people "don't know about".
With the important Christmas period in full swing most Xbox 360 owners are well aware of the titles yet to be released on the console during what's left of 2008.
However, Microsoft has been relatively quiet on the 360's line-up for 2009, focusing instead on 2008 titles like blockbuster gore-fest Gears of War 2 and more casual-oriented titles like Lips, You're in the Movies and Scene It? Box Office Smash.
McGill said: "Well I know a lot of the games coming out from us and our third parties. Most of them, in fact, have not been announced because everyone's very focused on what's out for Christmas. So it would do our third party partners a disservice for me to announce their great line-ups before they're ready to.
"So obviously we've announced things like Halo Wars coming out in the Spring, Halo 3: Recon later next year, Resi Evil 5 is coming to the platform, (I'm) really excited about that. So I think we're very focused on what's coming out for Christmas, we've talked about things coming out early next year. Very soon at some point we'll have the exclusive content for Grand Theft Auto on Xbox 360. So there's lots of great stuff coming in 2009 that people know about. Lots more, I'm sure that they don't know about."
When asked if Microsoft had surprises in store for 360 owners in 2009, McGill replied: "You could expect that, yeah absolutely." More PlayStation 3 News...