I think it'll be just Randy Orton and Daniel Bryan in a rematch. The title was held up because of their original match, so no reason to add a third member. HHH/Steph could simply say that if Orton doesn't get the job done this time, they're gonna cast him into the same category as Daniel Bryan and look elsewhere for the new face of the company.
Fast forward to the Battleground PPV, I think Orton wins the title without help or any sort of cheating or screw job. The way he does is, leading up to the PPV, he becomes more like the Viper of old and brings back the Punt Kick. Instead of The Shield attacking Bryan and holding him up for the RKO, he hits the Punt Kick a couple of times, maybe even the rope hung DDT onto a steel chair or something. Because of this, Bryan goes into the match with a (near) concussion, putting him less than 100% healthy to compete. But he does so anyway since he's determined to win the title and it ends up costing him, and he gets dizzy and near unconscious at one point and Orton takes advantage and wins the belt cleanly.
This accomplishes a few things - Orton winning the title 'cleanly' convinces HHH/Steph that he deserves to be the face of the company while also allowing Bryan a good excuse for losing that doesn't involve being screwed. It also shows the aggressiveness of the Viper returning to Orton's psyche and personality.