Interestingly, Dolph Ziggler and Daniel Bryan have been teasing a WrestleMania 31 bout over Twitter for the last few days.
While it initially may have appeared to be wishful thinking between two (understandably) frustrated wrestlers, per a report from this week's Wrestling Observer Newsletter, this is apparently the current booking plan for the pay-per-view:
We were flat out told there was no chance of Bryan being added and making it a three-way, because Vince McMahon felt that already was done last year. Bryan and Ziggler set up a match on Twitter, and that wasn’t fooling around, but the actual plan...That lets them be happy because they’ll have a shot at having the best match on the show if they don’t have their time sliced.
Following the deeply disappointing treatment of Bryan at the Royal Rumble—the star was hyped up for weeks as a potential winner and then treated as a total afterthought in the 30-man match—this at least offers a much-needed glimmer of hope for the performer.
As noted, they have a legitimate shot of churning out the best match on the card if WWE gives them the chance. They are easily two of the best in-ring competitors on the roster (only Seth Rollins is arguably better).
It's a chance for Ziggler to put himself back on the map too. He could use a high-profile match and an opportunity to showcase skills at the event—it could be the thing that allows him to break out of the midcard once and for all.
It will be intriguing to see if one of the guys turns heel or if WWE decides to go with a babyface vs. babyface bout, which is an unusual dynamic but hardly unheard of in wrestling.
If the writers elect to go with the former rather than the latter, Ziggler is the best candidate for a character change. Bryan is simply too popular right now for the fans to boo him under any circumstances.