The event also featured the in-ring return of English wrestler and London native Nigel McGuinness following his retirement in 2011 and subsequent transition into color commentary.

All In was first held as an independent professional wrestling pay-per-view (PPV) event in September 2018, and was produced by members of The Elite in association with Ring of Honor (ROH), which retained the rights to All In.

Storylines were produced on AEW's weekly television programs, Dynamite, Collision, and Rampage, and the YouTube series Being The Dark Order.

It consists of two single-elimination tournaments, one each for men and women, and the respective winners receive a trophy called "The Owen" as well as a commemorative championship belt.

During Double or Nothing on May 26, AEW president Tony Khan and Owen's widow Martha announced that the respective 2024 cup winners would also earn a world championship match at All In.

After the match, May turned on Storm, hitting her with the Owen Hart Cup championship belt and bloodying her in the process;[14] this explicitly aligned May's persona to the character of Eve Harrington in the 1950 film All About Eve, whose primary ambition in the film was to supplant Margo Channing—another inspiration for Storm's character—as a Hollywood star.

[20] In a backstage interview on the following Dynamite, Danielson teased a possible retirement storyline; he said the championship match made him realize he was putting wrestling ahead of his family.

As a result, on the June 6 episode of Dynamite, Danielson became the first wrestler to declare for the 2024 Owen Hart Cup and vowed to "go out on top".

[14] On the July 31 episode of Dynamite, Danielson said if he did not defeat Strickland and win the AEW World Championship at All In, he would never wrestle again; they subsequently agreed that the stipulation would be a Title vs. Career match.

[29] After a backstage brawl on the August 14 episode, Perry declared he would defend the title against Allin in a Coffin match, which was made official.

[32] However, after a confrontation between the two during AEW's panel at San Diego Comic-Con on July 25, Tony Khan officially scheduled Moné to defend the TBS Championship against Baker at All In.

[33] The opening bout, which aired on the pre-show, was a 16-man tag team match pitting Anthony Ogogo, Ariya Daivari, The Dark Order, Jay Lethal, Private Party, and Satnam Singh against Action Andretti, Kip Sabian, Kyle Fletcher, Lio Rush, Rocky Romero, Tommy Billington, and Top Flight.

[34] The second bout, which aired on the pre-show, was a mixed tag team match pitting Kris Statlander and Stokely Hathaway against Willow Nightingale and Tomohiro Ishii.

Following the match, a brawl broke out, promoting Kevin Von Erich to enter the ring and apply the Iron Claw to Taven.

The Young Bucks won the match and retained their titles by pinning Dax Harwood of FTR following an EVP Trigger.

The contestants were, in order of entry, Orange Cassidy, Kazuchika Okada, Nigel McGuinness (wrestling his first match since 2011), Kyle O'Reilly, Zack Sabre Jr., Roderick Strong, Mark Briscoe, "Hangman" Adam Page, Jeff Jarrett, Ricochet (making his unannounced debut), Christian Cage, and Killswitch.

[36] The eleventh bout was a coffin match in which AEW TNT Champion Jack Perry defended his title against Darby Allin.

Following the match, Perry and the Young Bucks seemingly attempted to burn Allin alive within the coffin, but were driven off by a returning Sting in his first appearance since Revolution in March 2024.