John Cena will hang up his boots after facing Gunther at WWE Saturday Night's Main Event this weekend. The Ring General won a tournament to secure his spot as Cena's final opponent.The undercard will feature a few of NXT's most spotlighted stars, including Sol Ruca, who takes on Bayley, and Oba Femi, who faces Undisputed WWE Champion Cody Rhodes.Je'Von Evans teams with TNA X Division Champion Leon Slater against World Tag Team Champions AJ Styles and Dragon Lee. With several brands represented, the next three heel and one face turn could go down at Saturday Night's Main Event.#4. Zaria finally snaps at friend Sol Ruca View this post on Instagram Instagram PostZaria and Sol Ruca's partnership has mostly been a vehicle to push Ruca to the top. She won both the Women's North American title and Speed Championship while Zaria stood by her side.Officials made the head-scratching decision to have Ruca miss a few weeks but defend both her titles. Zaria defended the North American title against Blake Monroe but lost. Sol then simply relinquished the Speed belt.She came back too soon, and through it all, officials have painted Zaria as the one at fault. She actually saved Sol from having her knees broken again by throwing in the towel against Monroe.Zaria watched Sol's NXT match from the stands, but the two appeared to reconcile in the parking lot. Since she asked Zaria to be in her corner, it's likely a setup for the Aussie powerhouse to turn on her friend at Saturday Night's Main Event.#3. Ricky Saints could turn heel a few waysJe'Von Evans and Ricky Saints have had a patronizing friendship. Both wanted the NXT title and whispered sweet nothings to the other when each pursued it.Evans is tired of hearing that he's the future, but it takes time for many stars to win major gold. Saints lost his title to Oba Femi at Deadline, but wanted a rematch at New Year's Evil.It created a situation where Evans didn't want to wait for his opportunity, so he faced The Ruler of NXT days after winning a title shot. Saints pulled the referee out when Femi was vulnerable to prevent Evans from winning.Saints could attack Cody Rhodes or Femi at Saturday Night's Main Event. He could also be unmasked as the hooded star who's stomped CM Punk, Rey Mysterio, and LA Knight.#2. Gunther has a change of heartWhile it could be far-fetched, The Ring General could turn face at Saturday Night's Main Event. He's had to deal with heels in the MFTs and Judgment Day over the last two years.He claimed he'd relish punishing John Cena in his final match, but he could come to respect the WWE Legend during and after the bout. RAW has several imposing heels, including the Vision, Judgment Day, Rusev, and potentially Brock Lesnar.Turning Gunther could be a calculated move to eventually challenge both The Beast and Bron Breakker in 2026. He's shaken hands with Rhodes and others who've defeated him in the past, and could do so again if he falls to Cena.#1. Randy Orton turns on his best friend at Saturday Night's Main EventIt feels like a record on repeat, but the best Randy Orton is a heel Randy Orton. He's been off programming for a few months after facing Drew McIntyre and Logan Paul.As long as The American Nightmare has the Undisputed WWE title, the potential for The Viper to turn is always a possibility. He wasn't able to defeat Cena in his home state after WrestleMania.Orton also fell to Rhodes in the King of the Ring tournament. The best heel turns occur when a friend turns on another. The timing would be right if he came back only to blast Rhodes with an RKO to close out Saturday Night's Main Event.