John Cena is all geared up to wrestle his last match at WWE Saturday Night's Main Event. A 21-time WWE champion has shared a two-word message ahead of The Cenation Leader's final in-ring appearance.The aforementioned star is The Miz. The 45-year-old has a lot of history with the Never Seen 17. A decorated star himself, The A-Lister is a former eight-time Intercontinental Champion, in addition to having won both the WWE Championship and the United States Title twice. He has also won the tag team gold on nine separate occasions.Earlier today, The Miz took to Instagram to post a picture from one of his earlier matches against John Cena. In the caption, he also pointed out that Cena's retirement was just six days away."6 days," The Miz wrote. You can check out his Instagram post below: View this post on Instagram Instagram PostThe Miz also competed in the Last Time is Now Tournament for an opportunity to be Cena's final opponent. Unfortunately, he lost his first-round match against Jey Uso. Although he tricked SmackDown General Manager Nick Aldis into taking injured star Sheamus' spot in the next round, he suffered another loss, this time at the hands of LA Knight.John Cena will face Gunther in his last WWE match. The Ring General won the Last Time is Now Tournament, defeating Je'Von Evans, Carmelo Hayes, Solo Sikoa, and LA Knight along the way. Having already retired Goldberg earlier this year, the former World Heavyweight Champion will look to win his first and only match against The Cenation Leader as well.John Cena confirms he will not be coming back for a WWE matchJohn Cena spoke about his impending retirement during a recent interview with The Ringer’s Bill Simmons.The veteran stated that he understood everyone's skepticism about him staying retired, as he noted nobody retires from professional wrestling. However, the 48-year-old reassured that he would never be stepping his foot inside the squared circle for a match after Saturday Night's Main Event."You don't have to believe anything you don't want to. What I've been able to do over 23 years is turn a lot of non-believers around, and that is by my actions. I don't expect anyone to believe that, like, 'Hey, I'm retiring.' Oh, no. The precedent hasn't been said. The precedent for wrestling retirement is like a wrestling wedding, like something's going to go wrong in the wedding. No one ever retires. I understand the skepticism, and you'll know I'm serious when I never come back," Cena said.Only time will tell if John Cena keeps his word and stays retired, unlike several other greats from the past.