Bray Wyatt used The Undertaker’s druids and entrance at WWE Fastlane. He was wheeled to ringside in a casket and cut a promo on The Undertaker where Wyatt said he will take Taker’s soul at WrestleMania 31.
As of this week, WWE’s current plan is to keep The Undertaker off TV until WrestleMania 31. Unless something changes, Taker will not be appearing on RAW or SmackDown to help build the storyline with Bray Wyatt.
The idea behind keeping Taker off TV is that we don’t know where he’s been, we don’t know what he looks like or what his condition is so it will be a bigger surprise when he does appear at WrestleMania.