It's been a while since the last Alan Wake-related news. However, it looks like Alan Wake 2 might be coming soon!
Althea Gata, an artist who worked at Halon Entertainment in April 2011, mentioned having worked on in-game cinematics for Alan Wake 2 on her LinkedIn page. This bit has since been removed. Halon Entertainment is a company responsible, among other things, for the Deliver Hope live-action trailer for Halo: Reach.
Alan Wake developer Oskari Hakkinen said last year that Microsoft had the option to pick up a sequel to the original game and suggested that the second game would be developed more quickly than the first time, which was being worked on for 5 years.
Source: 1Up