Former WWE World Heavyweight Champion Gunther dominated throughout the Last Time Is Now tournament, punching his ticket to Saturday Night’s Main Event XLII as John Cena's final opponent. His dominant performances, incredible in-ring skills, and power set him up perfectly for the biggest match of his career.The Ring General is now set to face the Greatest of All Time, John Cena, in the latter's final match. Cena is undoubtedly one of the most decorated names in the entire sports entertainment industry, and Gunther getting the opportunity to retire him is a massive feat in its own. While fans are excited as well as emotional ahead of Cena's last match, let's check out a few possible outcomes for the upcoming battle.#4. John Cena could make Gunther tap outGunther has not tapped out in many matches throughout his career, except in the World Heavyweight Title match against Jey Uso at WrestleMania 41. While John Cena is known for his power and submission skills, it won't be easy to make The Ring General tap out even on his worst day. However, Cena’s STF has ended major rivalries in the past, and using it one final time to put a break on the fairytale momentum of Gunther wouldn't be a bad idea. There is a reason why Cena is considered the Greatest of All Time, and The Franchise Player could prove it by making Gunther submit at SNME this weekend.#3. John Cena could pass out or tap outWhile fans might not like the idea of John Cena losing his final match, it remains a possibility. The Franchise Player is known for putting over young talent and has spent his entire Farewell Tour trying to do the same.On the other hand, Gunther has already claimed that he would make The Franchise Player tap out and is known for his incredible submission skills. While Cena might not lose his final match, he could still tap out or pass out.#2. Mystery man could cost John Cena his final matchThe mystery man from the Men's WarGames match at Survivor Series has been making headlines all around the world. While his identity has not yet been revealed, he has been protecting The Vision and helping them get the upper hand every time he gets a chance.While The Vision and the mystery man seemingly have no grudges with John Cena lately, things could get out of hand. The mystery man, just to make headlines and take all the spotlight, could cost Cena his final match.#1. The Rock could help Gunther winThe Final Boss had a huge hand in Cena's heel turn back at Elimination Chamber, but hasn't appeared on WWE TV since. The Rock and Cena have a long history, and since it would be The Franchise Player's final match, The Brahma Bull might make an appearance.However, considering the incredible character The Final Boss portrays, The Rock could further cost Cena his final match to make headlines and enhance his heel run. Only time will tell what WWE has in store for the stars next.