Triple H's Opponent for Wrestlemania ?

Source: Wrestling Observe

In case If  WWE Insert Bryan into title match, that would make a triple threat match between Shield unlikely, Since WWE does not want to have 2 triple threat matches on the same Event.

Another possibility is a match between HHH and Roman Reigns for the event. WWE is said to be very high right now on Reigns, and the storyline of The Authority using The Shield as henchmen for the past year would be a launching point for a match between Triple H and Reigns.