Sony previewed the trailer for Skyfall to an audience at 2012 CinemaCon in Las Vegas. According to Aceshowbiz.com:
The video opens with the interrogation scene where Daniel Craig’s Bond is looking at the city of London. Then, there is someone speaking on the voiceover, “Country”, to which Bond replies, “England.” It seems like the agent is playing some sort of word association game. Then, the other man says, “Gun”, while Bond responds, “Shot.” The next words is “Agent” to which Bond responds, “Provocateur”, as well as “Murder” to which the agent answers, “Employment.”
The article descibes more of the trailer and finishes by stating that Sony is already preparing a follow-up to Skyfall, that is currently schedule for 2014.