Mister Ski
Super Freak
My guess for the S7 premier is that they are going to start off by going back in time and showing the viewers how Glenn, Daryl, Rosita and Michonne ended up in the RV and how Negan's men captured Eugene. Where did Daryl get shot? How did they get them back to Negan? How did they prep the "Red Rover" walkers with Daryl and Michonne's outfits? How did Glenn get so beat up? Did Eugene put up a fight? He had a black eye. They skipped all that stuff for the sake of focusing on Rick's group and his rapid loss of control and confidence over the situation they ended up in.
Once the viewers are caught up from that perspective, then they will reveal who Negan is beating with Lucille and the aftermath. I seriously doubt they will show the actual blows to the skull, but we will definitely get to see the final result. This will allow the victim to remain a cast member through the first episode and have to report to set for filming these additional flashback scenes and the death scene. Might help to throw off spoilers out there who will be trying to see who is on set and who is not - at least for the first episode.
Once the viewers are caught up from that perspective, then they will reveal who Negan is beating with Lucille and the aftermath. I seriously doubt they will show the actual blows to the skull, but we will definitely get to see the final result. This will allow the victim to remain a cast member through the first episode and have to report to set for filming these additional flashback scenes and the death scene. Might help to throw off spoilers out there who will be trying to see who is on set and who is not - at least for the first episode.