#4 Dean Ambrose turned heel

Dean Ambrose snapped on his former Shield-brother Seth Rollins the same night when Roman Reigns announced his battle with Leukemia, and while some were shocked at the turn of events, this was the best thing done by the WWE in a long time.
'The Lunatic Fringe' is known for his lunatic behaviour, and while some may not appreciate it, the fact remains that he is still the most loved wrestler in the WWE. This turn was expected since his return at Summerslam, and the fact that it finally happened is a relieving thing for the company.
Look who just shut down all of Tony Khan's critics! More HERE.
The fact that he is able to play a heel or babyface with ease is a testament to his skill, and with this new found character he is able to keep audiences engaged which will work wonders for him and the company in the long run.