Sam Ernst (Haven writer) wrote this in his twitter account:

Whoa - disappeared into a writing hole for a couple of months! Hello twitter -anyone else headed down to #SDCC? Haven party and Haven Panel!
Also, big news coming from me and HavenJim - like where we've been and what we've been doing. It probably ain't what you think...
But it does involve a young up and coming writer named Stephen King...
It also involves an actress you may have heard of, Gillian Anderson. I am not $#$% kidding. (And yes, we're psyched).
So we'll have to wait until #SDCC.