Roman Reigns' epic battle to get the title from Rollins... Damn
I really hate tournaments and the forced rivalries they produce, but if the Authority lurk ring side and decide Reigns can't win they can make HHH the full heel bastard again. I'd not be against Sheamus working for HHH in a storyline, but he's got no momentum. HHH could convince Sheamus or forcefully strip Sheamus of his case and use it himself. Pick a new 'Man' or just halt the whole authority thing and go a completely new way
I can't imagine how fucked up the Rumble and Wrestlemania plans will be now. Every change to the world title scene will affect the plans for the those set for the Rumble win, and big Wrestlemania matches
But I'd not mind HHH vs Reigns, with whispers of Brock vs HHH and Rock vs HHH for a few months. That can't always be a solution though