It would appear two WWE WrestleMania 31 matches for March 29 have all but been confirmed - Daniel Bryan vs. Dolph Ziggler and Bray Wyatt vs. a returning Undertaker (pending his health). The biggest sign that they will take place is from WWE themselves. Today the following Raw preview was posted on WWE.com: 

For Wyatt:

“Following a dominant performance in the 2015 Royal Rumble Match, lasting more than 45 minutes and eliminating six Superstars, Bray Wyatt delivered a bizarre message on Thursday’s SmackDown that was even more cryptic than his usual proclamations. Asking “what makes you smile?” Wyatt claimed that he fears “nothing, living or dead.” He then promised that after what happens next, “it will be hard for you to ever smile again.” To whom was Wyatt speaking, and to what was he referring?”

For Bryan:

“But where will Bryan’s journey take him? Based on his interview on last week’s Raw, the leader of the “Yes!” Movement still has his sights set on the WWE World Heavyweight Championship, but his unceremonious ousting during the Royal Rumble Match by longtime nemesis Bray Wyatt has seemingly denied him his return to the WrestleMania main event. Will Bryan seek retribution against Wyatt for dashing his dreams for WrestleMania? Will Bryan’s social media exchange with Dolph Ziggler about a friendly match at WrestleMania 31 lead to a Show of Shows dream match for the two fan-favorite Superstars? Perhaps we’ll learn more about The “Yes!” Man’s next move on Raw.”