To me the most logical way to go is having Daniel Bryan finally win the Royal Rumble and go on to challenge Roman at Wrestlemania (I realize WWE and logical booking don't always go hand in hand). The buildup to Mania basically writes itself, Roman and Heyman could bitch about how the 2015 Rumble was supposed to be his big moment except the crowd wouldn't except him because they wanted Bryan to be the top guy.
That’s fine. As long as Bryan LOSES. They should not be taking the title off Reigns or even entertaining the idea yet.