I went back and watched a lot of the Brock promos right before the Royal Rumble, and it's VERY obvious they were planning Rollins to be the guy at Mania, hands down. Obviously they wanted to "make" Roman as well in the buildup but he underdelivered. Brock is an unbelievable babyface even before the Rumble.
Yes, it was all planned in advance, easily. Everyone was just paying attention to Reigns.
I feel bad for Roman. He's just not clicking with promos just yet. I feel its not entirely his fault because of the awesome creative power that is behind him. Though I guess you can argue that Rollins and Ambrose are also fed caca and still come out just fine.
He also needs to have more singles matches. I would not mind a best of seven with D. Brine, to be honest. They both have great chemistry in the ring and it'd blossom to a pretty awesome series of matches. That's how Roman is supposed to look. Too good, too stronk, too godlike. Not losing by school boy against Rollins a few weeks before Wrasslemania, brother.