The Darkness 2 will be receiving a demo very soon, but not everyone will have access to it right away.
Starting January 17th, Xbox Live Gold members will be the first to try out the demo. Those with an unpaid membership to Xbox Live will have to wait until January 24th. The second date applies to Steam and the Playstation Network as well.
European PSN users will have to wait one extra day, January 25th, and it is expected that Australian PSN users will have to wait until the scheduled update on January 26th.
The Darkness 2 will hit PC, PS3 and Xbox 360 on February 7th.