A former AEW Champion was named as WWE legend John Cena's second-best opponent. The Cenation Leader will retire from the active scene soon, and the winner of the 'The Last Time is Now' Tournament will determine his final opponent. He is also set to face Dominik Mysterio at Survivor Series: War Games for the Intercontinental Championship ahead of his final bout at Saturday's Night Main Event.Veterans and fans have been discussing his greatest moments ahead of the legend's retirement next month. Throughout his career, he has faced numerous formidable rivals. Adam 'Edge' Copeland was also one of his fiercest opponents back in the day. The two had great matches between 2006 and 2010.His top 10 rivals were recently ranked. According to Bleacher Report, AEW's Adam Copeland was ranked as the second-best rival of John Cena behind CM Punk. Other stars like Shawn Michaels, Brock Lesnar, Batista, and AJ Styles have also been named in the list.Adam Copeland talks about his chemistry with John CenaThe Cenation Leader and Rated R-Superstar have both paid tribute to each other despite being on different promotions.While speaking on The Score, Adam Copeland said the two stars had contrasting characters, which is why they clicked instantly.“I saw a clip where he did the whole set up and everything. It’s super fun. For John and I, we’re two guys that met each other at the right time. He needed a bad guy. I needed a good guy. It just clicked. You never know when something is going to click. ith John and I, from day one, it just clicked. Our characters were polar opposites. I knew what the assignment was, and so did he. You had two guys who were very willing to do what we had to do to get us both over," Copeland said.For now, it remains to be seen who John Cena's final opponent will be.