Serenity and Beyond: According to Joss Whedon,

"A sequel's unlikely," Whedon told Empire with a note of clear regret, "but it's amazing what permutations of something can happen." But if not a theatrical encore, that leaves... yes, you guessed it, a possible return to the smaller screen. "As long as I was able to service the characters with integrity and had enough money so that I wasn't hampered, then I would love to return Serenity to TV. I love that universe; it continues and those characters live on. There could be a series, there could be a miniseries, there could be all sorts of things. I'm not ruling anything out. I'll let it simmer for a while and see if anyone calls."

(Via BBspot.)