WWE Championship: Brock Lesnar
Brock Lesnar has been a looming threat to both WWE Champion Kofi Kingston and Universal Champion Seth Rollins. He has teased cashing in on both superstars since he has won the briefcase. Either Brock Lesnar or Paul Heyman have been appearing on Monday Night Raw, SmackDown Live, and even shows like Super Showdown and Stomping Grounds with the Money in the Bank briefcase.
Brock Lesnar has especially teased cashing in on Seth Rollins. He laid out Seth Rollins on an episode of Monday Night Raw and teased cashing in then. The Beast Incarnate tried to cash in on Seth Rollins again on Super Showdown but failed at doing so due to a timely attack by Seth Rollins.
Brock Lesnar has not appeared on WWE television since then, but he will likely cash in on Kofi Kingston instead as he has only really been confronting Seth Rollins. WWE probably wants to do a massive swerve and have Brock Lesnar survive Kofi Kingston on the first episode of SmackDown Live on FOX.