#1 Should not move - Roman Reigns

Roman Reigns has been the face of RAW ever since the first day of the brand split and hence, moving him to SmackDown Live does not seem to be a good move. Reigns had won every singles title that the red brand could offer him but unfortunately, he had been ruled out of in-ring competition due to Leukemia.
He recovered from Leukemia very quickly and even made his triumphant in-ring return at WWE Fastlane. The Big Dog has not lost a single match ever since returning and WWE has been using him in a lesser proportion now. If Reigns moves to SmackDown and if he is inserted in a WWE Championship feud with Kofi Kingston, the fans will once again turn on him (something that the WWE does not want).
Cody has no chance against John Cena? Details HERE
Also, its possible he could be feuding with Baron Corbin next, so it is but obvious that Reigns is not leaving the red brand any soon.