It's hilarious that Reigns has been in that many WM events now. He was pushed hard as a main eventer as a face when fans didn't want it, and once he got over big as a heel, they left have let his title reign linger on way too long. That's WWE for ya.
Cody Rhodes, to me, looks like a guy who would have been a mid-carder is just about any other era (like he was a decade or so ago when Orton, Cena, Triple H, Punk, etc. all were in or close to their primes), but they are so depleted from true main event stars now that someone has to be the top face. I read that they wanted Rock/Reigns for the main event last week, but once they couldn't get a deal worked out for Rock to work it, Rhodes was the backup plan and inserted into the spot. Given that, it's no surprise that he lost since they obviously had no intention of taking the belt off Reigns at this year's Wrestlemania.