It'll be a comic published at DC, or at Wildstorm, which is owned by DC.
Fuller says, "[I]t starts a new story. It’s basically Chuck, Ned, Emerson and Olive versus 1,000 corpses, so it becomes a zombie movie, but the zombies are articulate and smart and can do things that no other zombies can do."
Sure, it's only 12 issues, but if people go out an buy it, who knows!
Last week he talked about how he wants to run the comic:
I am going to pull together the Pushing Daisies writing staff. It will be run like a writer’s room, where I will write the first story, and we will arc out the other issues, which will comprise what we were going to do in the back nine. We’ll also make it accessible for those who are not familiar with the TV series, as well as introducing villains we couldn’t do on ABC.
As the Televisionary reminded me in his post about the last episodes, the first of the final three episodes airs on May 30th.