WWE.com currently has a poll asking which WWE Superstar should challenge Brock Lesnar for the WWE Universal Championship if he retains the belt against Roman Reigns at the Greatest Royal Rumble in Jeddah, Saudia Arabia, on Friday, April 27th.
The WWE Network event features a Reigns-Lesnar rematch as well as a 50-man Royal Rumble, John Cena vs. Triple H and matches for the Intercontinental, United States, Raw Tag Team and SmackDown Tag Team belts.
Given WWE is polling possible opponents for Lesnar, you would have to assume WWE is considering not having Reigns win the belt overseas as everyone expected after Lesnar shocked most by retaining at WrestleMania 34 amid rumors he was leaving for the UFC. Perhaps WWE is even considering Reigns not winning the belt right now.

WWE Universe members can vote for the following opponents: Samoa Joe, Finn Balor, The Miz or Braun Stroman. 
Here is a tweet link to the poll: 
 
 

If @BrockLesnar defeats @WWERomanReigns at #WWEGRR, who should challenge him first for the #UniversalTitle? @HeymanHustle VOTE NOW! https://t.co/eB6pba6Da9
— WWE (@WWE) April 14, 2018