WBC and WBO lightweight champion Diego Corrales is ready to step up a weight and fight Ricky Hatton in an amazing double-bill involving Joe Calzaghe.
Diego Corrales wants to step up a division to face Ricky Hatton
Corrales wants to face Hatton on the same card as Welshman Calzaghe's projected super middleweight unification with Jeff Lacy in November.
Gary Shaw, who promotes both Corrales and Lacy, says he is already in talks to hold the fight in Cardiff.
That proposal would see 60,000 fans packed into the Millennium Stadium.
Shaw was ringside with his fighters to see Hatton's sensational win over former IBF light welterweight king Kostya Tszyu on Sunday morning.
"Diego would love to come to Britain and make a super-fight with Ricky," Shaw said.
"I have been talking with (American pay-per-view network) Showtime today about making the fight on the same card as Calzaghe-Lacy in one of your biggest arenas.
"It is something that could really happen and it is the biggest fight out there at the moment.
"Diego never takes a backward step and neither does Ricky - it would be an incredible fight.
"He is the man Diego wants and he is willing to come to Britain to get him."
Joe Calzaghe could head a mouth-watering Millennium Stadium bill
Corrales holds the WBC and WBO lightweight titles, having stopped Jose Luis Castillo last month in a war most ringsiders described as one of the greatest in boxing history.
Hatton's rival light welterweight champions - WBC holder Arturo Gatti, WBO title holder Miguel Cotto and WBA champion Vivian Harris - have already all expressed an interest in fighting the Mancunian next.
But the move by Corrales' camp throws another spicy option into the mix.
Manchester's MEN Arena saw 22,000 packed in to watch Hatton beat Tszyu.
The same venue had been mooted as a possible site for when WBO king Calzaghe faces Lacy - providing the IBF holder gets past Robin Reid in a title defence in Florida on 6 August.
But Cardiff was the other suggested place and the Millennium Stadium would be ideal to hold what would be one of the biggest ever boxing promotions on British soil.
One immediate problem, however, is that the Wales rugby union team has Test matches arranged at the Millennium Stadium on all four weekends throughout November.
They face New Zealand on Saturday 5 November, Fiji on Friday 11 November, South Africa on Saturday 19 November and Australia on the final Saturday, 26 November.
That leaves only 12 November as a feasible date for the boxing, although it would take some feverish work to prepare the stadium in time.
That is despite the fact the main bouts would probably take place in the early hours of Sunday because of the American pay-per-view audience.
Another option would be to move the match against lesser lights Fiji to another venue, perhaps the new 20,000-seater stadium at Morfa that is shared by Swansea City football club and the Ospreys regional rugby side.