6. Brock Lesnar
Brock Lesnar is still a big name, but he's not much of a draw anymore in WWE. The company has no one to blame but itself. After being one of the top stars in UFC, WWE brought in this unstoppable monster, and then had him lose his first match. His second feud was against Triple H, the COO of the company, and it only further damaged his aura. If a former MMA champ can't beat a semi-retired 44-year old man, then why is he considered so tough? Sure, Brock beat Hunter at SummerSlam 2012, but fans weren't exactly begging for a Mania rematch. But they were given one anyway. Still, at the time it was kind of special to see Lesnar compete at WrestleMania. It was only his third match upon his return...and he lost again. Lesnar was now an unspectacular 1-2. Lesnar later cheaply defeated Hunter in a rematch, then had a fantastic battle with CM Punk at SummerSlam. But every time he showed up, he just felt less special than the time before. He then took on The Big Show in a match we'd grown tired of 10 years before, and now he's set to face off against Taker. Perhaps had Lesnar gone undefeated up to this point, this match would feel epic. Instead, he's 4-2 and facing off against a man whose 21-0 at WrestleMania. Gee, I wonder who's going to win? Besides that, Undertaker will be 49 years old by the time WrestleMania comes around, and is finally starting to look his age. A few years ago this match would have been huge, but Lesnar just feels like he's set up not as a threat, but as another notch in Taker's belt. And so far, fans are reacting accordingly.