AMCtv.com had a chat with screenwriter J Michael Straczynski on his future film projects and gave a little info about the condition of the Sliver Surfer spin-off and its not looking good. Due to the failure of the Fantastic Four 2, Straczynski does not think the film will be made and had this to say.
Whether or not it ever gets made I don't know because they were kind of disappointed in how Fantastic Four 2 did. And given how this will be a subset of FF2 in terms of the marketing strategy, I think there is hesitation there about putting it forward. The script is pretty good, I like it, but whether or not it goes into production, I have no idea.
J Michael Straczynski also talks about bringing World War Z to the screen.