Rumors have circulated about a sequel to Joss Whedon's 2005 sci-fi film, Serenity. The first film did not perform hugely well in box offices, and Whedon made statements in 2006 that there would be no sequel. But sales of the DVD have been popular enough to prompt a "Collector's Edition" of Serenity. Interviews with both Whedon and actor Alan Tudyk have mentioned that continued sales performance make a sequel possible. Both have mentioned that said release would most likely released straight to DVD.
Quotes
"They had to put [the new DVD] out because they've been selling out of the other one, and so Universal's like 'So, let's do another one.' And now... there's now a chance there's going to be another movie." -Actor Alan Tudyk "Well it’s probably not being discussed in boardrooms right now, but the fact of the matter is if it makes enough money sooner or later they say 'hey, this is money!'" -Director Joss Whedon