#2. Why he will: To put the title on Roman Reigns around October

Another place where we'll give WWE credit where its due is their handling of Roman Reigns since his return. It's been around four months now since The Big Dog returned from his battle against leukemia, but fans are yet to fully turn on him.
If anything, they've done a really good job in making him remain popular. Due to Seth Rollins and Kofi Kingston taking up the main spots, they've allowed Reigns to take his time to rise up again, involving him in upper mid-card feuds.
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With that said, his move to SmackDown was no random one. WWE knows that he's going to be a central figure on SmackDown when the FOX deal begins around October and that's the perfect time for a title change. It'll allow Shane McMahon to have a transitional run and just before or maybe even on the FOX debut, WWE can have a title change and finally make Reigns champion again.