SCSA pointed out the unwritten part of this.
When you think about it, Ambrose and Reigns "almost" have the same story arc since last WM, don't they?
Ambrose was screwed over by the dusty finish at Elim Chamber, lost at MITB on a technicality, went into the Rumble after already wrestling a LMS match
Reigns got cashed in on at WM while battling Lesnar, once at Survivor Series while battling Hunter, was attacked by the League of Losers at TLC, had to start at #1 during the Royal Rumble*
(note the asterisk)
The Authority has handed both title shots for no reason, the Authority has held them back, they both got ragdolled by Strowman in-between, blah blah blah. Except with Reigns it's like "It's One Verse All at the Royal Rumble!" "How dare you betray us, here's a match with the 500 pounder everyone beats!" whereas Ambrose just quietly fades into the IC title scene or off a PPV card altogether until it's time to be Roman's pop machine... because Ambrose is actually fighting the company.
It's just like Extreme Rules 2011. "John Cena, after such a terrible year, finally has regained the WWE Championship! After all the crap he's been through with the Nexus and being fired and HE OVERCAME IT ALL MAGGLE" oh piss off just 30 minutes ago we watched Christian finally win the World Championship after 15 years it seems, now youwant us to feel bad for Cena because he had to be in a different story for a year? Go fuck yourself, do not pass Go, do not collect $200