AEW All Out is set to be a must-see event for All Elite Wrestling. It will feature some of the biggest showdowns of the year, holding great importance for AEW moving forward. One of the most anticipated showdowns is Big Bill taking on returning Eddie Kingston in a singles match. However, Tony Khan might be preparing a huge surprise for this match in the form of a 26-time WWE champion.Khan could bring back former WWE Champion Chris Jericho as a replacement for Big Bill at All Out. The Learning Tree is a six-time World Champion, a nine-time Intercontinental Champion, a two-time US Champion, a one-time Hardcore Champion, a one-time European Champion, and a seven-time tag team champion.Y2J has been out of AEW since April this year. However, he is still one of the biggest stars in the company at the moment. With AEW planning to make All Out a memorable show due to it being on the same day as WWE's Wrestlepalooza, Jericho's return could be a game-changer.Moreover, fans have been lambasting All Elite Wrestling for spoiling Eddie Kingston's much-awaited return. Many believed that The Mad King should have made a return in an epic feud instead of being involved in a random match against Big Bill. Therefore, to make up for that, Tony Khan might replace Bill with Chris Jericho to raise the star power of this match at AEW All Out.It could be a major surprise for fans and has the potential to grab a lot of eyeballs. Besides, it could kick off a feud between The Learning Tree and The Mad King following All Out. Moreover, Khan has already made it clear that he wants to bring back Jericho to All Elite Wrestling. Therefore, there are high chances for such an angle to unfold at AEW All Out this weekend.But with that said, it is just speculation at the moment. Only time will tell what Khan and his creative team have planned for this epic showdown between Big Bill and Eddie Kingston at the spectacle this Saturday.Eddie Kingston is more determined than ever to make his return at AEW All OutEddie Kingston will make his return at AEW All Out after a break of more than a year. The Mad King has been out of action since NJPW Resurgence last year, where he lost his NJPW Strong Openweight Championship to Gabe Kidd. Kingston suffered a leg injury during that bout and has been recovering from it for the past year.However, when Big Bill made the challenge to him on Collision last week, the 43-year-old could not help but accept. He issued a message on Threads, calling out Bill to send the location for a match. Kingston also revealed that he is done with the negotiations and cannot wait to be back in the ring.“So [I] got the phone call, and the money is right; contract is signed on my end. So Big Bill, you dumb, goofy b*****d, just send location," he wrote. View this post on Instagram Instagram PostThe former Continental Champion has been through a big setback this year. It will be interesting to see how his storybook comeback will play out this weekend in Toronto.