My favorite quotes from the Trailer:

Wash: It's going to get "Interesting"
Mal: Define "Interesting"
Wash: "Oh God, Oh God, we're gonna die?"

Mal: I don't murder children
Bounty Hunter: I do

Mal: She is a might unpredicable. Moodswings, and sort
Bounty Hunter: It's worse than you know
Mal: It usually is