I really hate John and he got what he deserved in series 4. He basically set in motion Grace's and his own death by engaging in a senseless feud with Changrettas over Lizzie. I miss Grace, she was the only one who could get through to Tommy. Anyway. Since there's no longer Sabini, Solomon or Italians, I doubt there's going to be a gangster as a villain in series 5. It's probably going to be the most political one yet. I bet Churchill's going to be back and he'll definitely have a long screen time with Tommy. I also think that Michael has been very ambitious from the beginning, I don't think he came back for Polly. I would be interested in seeing how he chooses to rise in that world. Given that Tommy has retired, he becomes the natural leader. While Tommy was trying to go legal, I wouldn't be surprised if Michael takes the shady route. Polly has been in denial (Michael calling what she did to get him out of prison as "funny" or telling her that he's no longer a child). I think she is finally going to see Michael for what he is and she's definitely going to break down again. Arthur is unpredictable, probably confused. Linda was doing cocaine, so it's going to be a tough time for them. Whether they separate or not, I doubt Arthur is going to be as violent as before. Ada's part in the story is only diminishing. So, I think series 5 is going to be very different from what we've seen so far. I don't think we'll be seeing as much of the Shelby family as we've been used to. It's probably going to be all about Tommy dealing with politics while protecting his family. While I really hope that series 5 is going to be great, I think it's going to be really challenging to make it better or as good as the previous series, especially with so many characters dying or getting sidelined on the show.