We've received a full trailer, and a comprehensive cast list, and yet there hasn't been a sign of that baseball bat-loving psycho. Now, I'm sure that most fans will be watching Season 6 all the way through, scanning carefully to see if this villain is teased.
For those that suspect that Negan may be left until the very end of the season to be suddenly unveiled, no... sorry.
News of the casting would have gotten out, and The Walking Dead is not the kind of show to casually throw away Negan's introduction on some last minute cliffhanger.