5 Superstars Undertaker could face at WWE SummerSlam 2019
#4 Matt Riddle
Although a pretty strange choice, this could actually work if handled correctly. It was reported a while ago that Brock Lesnar wants to retire at WrestleMania 36. Matt Riddle has repeatedly said that he wants to retire The Beast. If Lesnar is indeed retiring next year, another legit MMA fighter would be an incredible choice as his opponent. Besides, Riddle is a chock full of charisma.
For this to happen, he needs to be put on the map starting right now, and what could be a better way for him to make a mark on the main roster than by putting down The Phenom at SummerSlam? Taker's health is going downhill with each passing day, to the point that WWE didn't bother giving him a program for WrestleMania 35. Let The Deadman give Riddle a big rub so that he could become a legit threat to Lesnar for next year's WrestleMania, in Brock's supposed final match.