#1 Seth Rollins vs Shinsuke Nakamura

This is probably the least built match on the main show, but it still has the potential to be the best match of the night, or even the year. 'The Kingslayer' Seth Rollins has been in red-hot form this year, and has already delivered multiple match of the year candidates.
'The King of Strong Style' Shinsuke Nakamura is a world-renowned wrestler who has high potential. His main roster run has been pretty dismal till date, and most of his matches have been pretty ordinary.
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His performances in NXT prove otherwise. He was a magnificent worker there as he produced several outstanding matches. His takeover match against Sami Zayn was critically acclaimed, and was arguably the match of the year in 2016.
So if given the right opportunity and time, The Artist and The Kingslayer definitely have the ability to deliver an instant classic. Dean Ambrose's possible interference during the match makes it even more intriguing.