Harker was originally going to follow protagonist Jonathan Harker as he sought revenge against Dracula, who attacked his love interest Mina. The game was to be based on Bram Stoker's work and focus on vampire execution and environmental exploration. Harker was tentatively slated for release on PS3, 360 and Wii.
We contacted Foundation 9 PR regarding this indefinite hold but they were not available for comment, so treat EuroGamer's information as possibly unofficial until we can confirm it directly with the publisher.
Update: We were able to reach a representative at Foundation 9 and confirmed that this information is official. Harker has been put aside and the newly named Double Helix is in fact working on Silent Hill V. The team is apparently very pleased with the opportunity.