Joss Whedon made a comment on Whedonesque.com that there was no Serenity sequel in the works, squashing rumors that there were. In the process, a number of people seem to think this means there will NEVER be a sequel – including IGN. However, given a followup comment it seems people have gone off the deep end. Absolutely nothing is in the works, and he will not work on it – unless asked to by a studio. In other words, he isn’t going to work on it on his own time. Still, I think it will be unlikely that another production will come about.