Seth Rollins

The simple logic behind Seth Rollins moving to SmackDown Live, really.
Jinder Mahal brought the US Championship over to Raw, so it only makes sense for the Architect to take the Intercontinental Title the other way.
Look who just shut down all of Tony Khan's critics! More HERE.
Now, if he will lose the strap on his first SmackDown Live show like the Modern Day Maharaja did on Raw remains to be seen, but for what it's worth, it's highly probable that a tough test awaits Rollins on the blue brand.
Also, Rollins is one of the top babyfaces in the WWE today and having him help AJ Styles keep SmackDown Live ticking over seems like a good bit of business, especially since Nakamura's main roster run has been largely hit or miss so far.