AJ Styles
It is possible that we can see this match at Survivor Series 2018. AJ Styles is the current WWE Champion and if he can get past Samoa Joe at Hell in a Cell and the Super Showdown. Braun Strowman will challenge Roman Reigns for the Universal Championship at Hell in a Cell.
If Strowman can defeat Reigns, he will face Styles in a champion vs champion match at Survivor Series. This can be a great match that would tell a great story.
Strowman can be the dominant champion that underestimates the wily veteran in Styles.
Styles can certainly cut his opponent down to size with strikes, submissions, and high flying moves. Also, he has shown that he works well with big men when he faced Samoa Joe, Roman Reigns, & Brock Lesnar.
This match can also help show that Strowman can wrestle 20 to 30-minute matches. This is certainly a potential main event for Survivor Series.