From that trailer, were given the vibe that season 6 has a lot to do with christopher, hence Tony's dialouge from season 3 in the trailer from when Christopher gets made.
"Keep your friends close, but your enemies closer" -Micheal Corleone
"Suck it up, take the fall, do the time. That makes you what you are, that makes you who you are." -John Gotti
"you heard of the new chinese godfather? He made em an offer they couldnt understand" -Corrado Soprano
