8. Ending The Streak
Not every controversy has to happen outside of the ring or cage. To put it bluntly, having Brock Lesnar end the streak, while not entirely the fault of Lesnar, is probably one of the biggest controversies the ex-UFC champ has been in in the WWE world. Why? Because while walking out on the company in his first run can be forgiven and forgotten, no one can ever forget, or undo, the fact that he ended the WrestleMania win streak of The Undertaker. In the end, it all came down to Vince McMahon and Taker himself giving the okay, but Lesnar is always going to shoulder some of the blame for being the one to actually win - and the fact that Taker suffered a concussion in the match didn't help things either.