Top 5 Transitional World Champions in WWE 

#2 Brock Lesnar (2018):

Putting the Universal Title on Brock Lesnar in 2018 was the right choice.

After keeping the Universal Championship hostage for over a year, Lesnar dropped the title to Roman Reigns at Summerslam 2018. However, Reigns had to vacate the title due to the return of his Leukemia. Reigns was reportedly supposed to hold the title until at least Wrestlemania 35 and main event the show for the fifth time in a row. The Big Dog's sudden departure caused the entire plans to be reshuffled. There was no legitimate main event star on Raw with Strowman having Backstage Heat and Rollins being a prominent part of the mid-card division.

This caused WWE to put the title back on Brock Lesnar at Crown Jewel until Rollins could be re-transitioned into the main event scene. The Beast Incarnate's transitional Title reign lasted over 5 months. He finally dropped it to the Kingslayer (now the Beastslayer) at Wrestlemania 35 in a shocking fashion.