lol the Roman reigns project is Vince's ego getting the best of him. He's merely trying to tell/force fans what they will like. He thinks that because Cena was somewhat forced and it worked, he can do something similar with Roman. It's not always like that. Cena, was and always has been a major exception to everything. Sure, he won the US title and didn't win the WWae title right away, but WWE did take a little bit of a gamble with him when they have him the main event at mania and let him end JBL'S streak. After that, he drew ratings, had a natural charisma that people liked, and seemed like a natural face. He's the kind of star that can walk into a building, have half the crowd booing the Shit out of him, and the other half cheering like crazy. He's big, powerful, good on the mic, and insanely hard worker.
With that being said, Vince feels like lightning will strike twice. He thinks that because Cena came up this way, it must work well th reigns, because Reigns has the look and image they want. So they force reigns into a main event. A royal rumble win. A mania win. All sorts of shit. And the fans just don't wanna see the same shit. It's feels too familiar and honestly I don't think reigns is a natural face like Cena is.
All in all, the Roman reigns project is simple: stop force feeding the fans what Vince wants to see. Let him be himself a little more. Let him play who he is: a heel, maybe good guy, bad guy role. Then keep pushing some main events.
Idk there's more to it than that, but I feel like WWE is simply pushing at any cost because Vince needs a new cena. Period. And they want Roman as that guy. The difference is that Cena came up more naturally and was gambled on for the new generation. He worked and was making tons of money. Don't force Roman into those shoes and expect the exact same results.
For example, look at the success of the Wii vs. the Wii U. The Wii makes tons of money. It did this because it was fresh, different, and enjoyable. Much like Cena. The Wii U is basically a Wii just with a little bit of a different twist. It fails and barely makes any money. Seems like a waste.
Cena is the Wii. Roman is the Wii U.