It now appears that one of those "great British fighters" is Joshua while WBA light-heavyweight champion Dmitry Bivol is reportedly in talks with the Saudis to get on the card as well.

Source: https://www.express.co.uk/sport/boxing/1833899/Anthony-Joshua-Deontay-Wilder-boxing-news

Miocic has competed at heavyweight his whole career - while Jones has spent most of his career at light-heavyweight.

Source: https://www.dailymail.co.uk/sport/mma/article-11822845/UFC-285-Jon-Jones-fight-following-dominant-victory-Ciryl-Gane.html?ns_mchannel=rss&ns_campaign=1490&ito=1490

Now that he had dispatched Ryder via bruising unanimous decision, Álvarez wanted a rematch with the last man to defeat him, Dmitry Bivol, in the weight class where they clashed last time, the 175-pound light-heavyweight division.

Source: https://www.nytimes.com/2023/05/07/sports/canelo-alvarez.html

Ricky Hatton won his light-heavyweight bout with Paulie Malignaggi after the American’s corner retired him in the 11th round on this day in 2008.

Source: https://www.expressandstar.com/sport/uk-sports/2023/11/23/on-this-day-in-2008--ricky-hatton-dominates-paulie-malignaggi-in-las-vegas/