#1 The Miz
One of the biggest heels of the company went through a face-turn. He has since been battling just Shane McMahon.
The feud, that has had a personal touch to it, but though the match at WrestleMania was a good setup for something bigger in the long-run, continuing the rivalry has not been the best idea.
The Miz could have really spiced things up in the Men's MITB match with his comments and remarks, as his talking skills are one of the best in the company at present. Most of the Superstars involved in the match are really good fighters, but that not great when it comes to the mic.
They could have really made the match "must-see" with his presence and it is still not clear what the writers have in mind, with his baby-faced character. He surely deserved to be in that match and could have made an impact.