Ice said:No, but it does takes hours upon hours upon hours to do what he does on Lost.
Not only that, but like Alan Heinberg has said, you can be late with comics. If you are late on a TV show you get fired. Priorities.
As for him finishing the scripts - I don't believe it. At best I think he will probably get the plotting done, and a ghost writer will finish scripting. And with Yu on NA, we won't see any of it any time soon.