The post adds that Reigns will be “running Raw,” and that the move to Smackdown will aloe Joe to play a bigger role. Joe is slated to face Reigns at the upcoming Backlash PPV event.
Per source: Samoa Joe moved to #SDLive to avoid Reigns. The two will have a match soon, however following that, Reigns, as expected, will be running #Raw. As such, Joe wouldn’t be a pivotal part of the show. WWE want him to play a big role — he wouldn’t be on Raw, hence the move.
— PWStream (@PWStream) April 22, 2018