WWE turned down the chance to run Wembley Stadium for a pay per view, before AEW snapped at the chance for their UK debut.
Vince McMahon and Triple H brought a WWE event to the UK for the first time in 30 years last year.
Clash at the Castle brought the WWE product to Wales for the first time, drawing one of the biggest wrestling crowds in British history.
The main event of the show saw the Scottish Drew McIntyre take on Universal Champion Roman Reigns, 30 years after British Bulldog battled Bret Hart at Wembley Stadium.
While AEW are set to bring All In to Wembley Stadium, WWE actually turned down the chance to run Clash at the Castle in London.
As reported by Dave Meltzer in the Wrestling Observer, WWE originally looked at having Clash at the Castle take place at Wembley Stadium (albeit likely under a different name.
However, Cardiff Council offered to pay more money than London did to host the event, owing to the huge amount of money that would be injected into the local economy surrounding the show.
Cardiff also had the added bonus of hosting the show in the Principality Stadium – the only stadium in the UK with a fully retractable roof.
This gave WWE assurances that, even if the British weather was typically terrible, Clash at the Castle could still go in uninterrupted.
The closed roof also kept all the sound in the stadium, making for a better atmosphere for the event.
AEW are now set to run Wembley Stadium for All In on August 27th, 2023. The event is set to be AEW’s biggest event ever, with over 70,000 tickets already sold for the event.
The show could become the biggest selling wrestling event of all time, bigger than any WrestleMania ever – click below to read more about that.