John Cena's potential final opponent just sent a one-word message. He picked up a huge win on WWE RAW.The Last Time is Now Tournament kicked off a few weeks ago. This tournament will determine who will be John Cena's final opponent at Saturday Night's Main Event next month. The tournament featured stars from RAW, SmackDown, NXT, and even TNA. The tournament also saw the return of Gunther, who competed in the first round against Je'Von Evans and won. This week on RAW, the Ring General competed in the second round against Carmelo Hayes and won again. Gunther is also the favorite to win this tournament.Following this, the Ring General took to Instagram to post a photo from his match with Carmelo Hayes with a one-word caption."Onward"Check out his post here: View this post on Instagram Instagram PostCM Punk also picked Gunther to be John Cena's final opponentGunther has been a dominant force in the WWE. His dominance has continued on the main roster, where he became the longest-reigning Intercontinental Champion of all time. The Ring General is also a former World Champion. He was also the person who retired Goldberg earlier this year. Given his impressive list of accomplishments, it should come as no surprise that he is the favorite to win the Last Time is Now Tournament.Speaking to Kay Adams of the Up and Adams Show, CM Punk was asked to pick John Cena's final opponent. The Straight Edge Superstar said that Gunther will win the Last Time is Now Tournament."I don't know if it's perfect, but it's looking like Gunther because I've been in the ring with him, and I know what he can do, and I don't know who else in the tournament can beat him right now," Punk said.It will be interesting to see whether Gunther will win the Last Time is Now Tournament.