Reactions to the footage shown at CinemaCon for Gone Girl are all positive:

From the Hollywood Reporter:

Gone Girl’s dark trailer showed Ben Affleck’s character dealing with a media frenzy after his wife (Rosamund Pike) disappears. The trailer promises a haunting thriller, very much in line with Gillian Flynn’s book on which it is based. Affleck’s character can be seen creepily posing with his wife’s “Missing” poster and being harassed by media and police as the search continues for her. “I did not kill my wife. I am not a murderer,” says Affleck’s haunting voice-over towards the end of the trailer.