#1 A feud with a new Superstar

Seth Rollins has been feuding with Brock Lesnar for many months now, and it is likely that the Beast could be paired with someone else after his WWE Universal Title win at Extreme Rules.
Of course, there is a possibility that Seth Rollins gets a rematch at SummerSlam but even then, it is unlikely that Lesnar would once again lose the title to Rollins and that, too, just a month after regaining it.
As a result, it would be safe to admit that the Beast could be in a program with another Superstar in the future. Should that be the case, it would automatically give traction to the Superstar.
The likes of Braun Strowman and Drew McIntyre are Superstars who are waiting in line for an opportunity and squaring one of them up against Lesnar and pushing them would do them a world of good.