A potential spoiler on WWE's plans for John Cena's final match has been revealed. The 48-year-old will be lacing up his wrestling boots for the final time to battle Gunther at Saturday Night's Main Event this weekend.According to Bryan Alvarez on Wrestling Observer Live, the promotion may be planning on having Cena versus Gunther kick off Saturday Night's Main Event. The Ring General defeated LA Knight this past Friday night on WWE SmackDown to win the Last Time is Now Tournament and earned the right to be The Cenation Leader's final opponent as a result of the victory."At this point, there is no set runtime for Saturday Night’s Main Event, so everyone will get all the time they need. Cena vs. Gunther is currently scheduled to open the show and Cena will get as much time as he wants," he said. [H/T: WrestlePurists]Gunther kicked off this past Monday's episode of WWE RAW and delivered a message to the Dr. of Thuganomics ahead of SNME. The former leader of Imperium vowed to force Cena to submit during his retirement match this weekend.WWE legend suggests John Cena's career might not end this weekendWWE Hall of Famer Bully Ray recently claimed that John Cena's in-ring career could continue following his match against Gunther at Saturday Night's Main Event.Speaking on Busted Open Radio, Bully Ray stated that he would not be surprised if The Rock returned to confront Cena this weekend. He added that it could lead to another WrestleMania match between the two stars and added that The Cenation Leader deserved to end his career at The Show of Shows."For some reason, I don’t think this ends in Washington, D.C. for John Cena. And I would not be shocked if in the midst of all of the happy, happy, joy, joy, [Rock’s theme song] ‘If you smell what The Rock is cooking [plays]. I’ve said this before, it just doesn’t sound right — Cena, last match, Washington, D.C., Saturday Night’s Main Event. What sounds right is John Cena, last match, WrestleMania, Las Vegas.” (H/T - TJRWrestling)USA Network @USANetworkLINKTalk about a Hall Of Fame career for @johncena! John Cena rides off into the sunset on Saturday Night’s Main Event this Saturday at 8p E/5p P on Peacock!It will be fascinating to see if Cena can defeat Gunther in his final match this weekend.