#4 It will be a great match

Whether you get behind him or not, you can fault Roman Reigns' promo skills but not his ring work.
He's consistently delivered bruising, engaging encounters in the ring, against a whole host of opposition ranging from Bray Wyatt to Braun Strowman.
Female superstar says she inspired John Cena turning heel HERE
And we all know how convincingly John Cena quelled the notion that he couldn't wrestle by putting on a series of highly entertaining matches in the weeks of the US Open Challenge.
Bottom line: both these men raise their game for a big event. And it really doesn't get bigger than facing one another at No Mercy.
We can likely expect a great match between them at the pay-per-view and that only bodes well for Roman Reigns.