#3 Bobby Roode
Bobby Roode will have a big spot at Survivor Series as a member of SmackDown's men's team, but he'd been rather directionless since getting called up to the main roster after SummerSlam. I'm starting to think that feuding with Dolph Ziggler is a kiss of death in 2017.
While I'm sure he'll have more prominent programs in 2018, Bobby Roode is just one of those guys that needs to be a heel. The difference between his heel and babyface act is just so glaring and so obvious that there isn't really any other answer.
Now that the WWE Championship has been blissfully liberated from Jinder Mahal, and, as trends might suggest, he won't be getting it back anytime soon, the main event picture suddenly needs a top level heel. Bobby Roode is obviously the right person to fill the void.
A heel turn on the road to WrestleMania and a post-WrestleMania feud with either AJ Styles or Shinsuke Nakamura would be best for business on SmackDown, assuming all three remain on the blue brand following the next draft or shakeup, of course.