#5 Brock Lesnar
A match against Brock Lesnar would be considered impossible due to constant rumors of Lesnar leaving after WrestleMania 34 and it would be hard to book due to Lesnar's style of wrestling which is brutal.
But if the rumors fail to be true and, AJ Styles has proved anything, Lesnar has the ability to produced masterpieces in the squared circle with a smaller opponent. Fans were clamoring for this dream match of Daniel Bryan vs Lesnar at WrestleMania 31.
If Lesnar stays around after WrestleMania 34, this is a sure-fire Summerslam main event that will finally pit 'the beast' against the 'Ultimate Underdog'.
Edited by Akhilesh Tirumala