Oh, this is going to be an awesome storyline.
Honestly, the story of Daniel Bryan and Kane is actually a good one. One time frenemies, the YES/NO creation, Dr. Shelby, tag titles, the turn, the return of the mask, the feud is at the heel part. Eventually, before Kanes final match in the WWE; it'll come full circle with Kane saving Daniel Bryan. Kane will then go on to finish a final feud and fight his last match.
The problem is that the feud has been stupid. Kane is Stephanie's property, his monster. She's using him to fight his old friend. Maybe if they played into the old friendship instead of how much he could scare Brie Bella, then this could be a good feud. The failure is the laziness and lack of effort into that storyline. The two were an awesome tag team and they should get an awesome feud.
This shits a solid C+ storyline. That's the problem.