The super-middleweights have confirmed that they will fight for a second time later this year, with the bout taking place in the UK.
The Dane's promoter told Sky Sports News: "The last time there were 5,000 [Kessler fans] there for the Calzaghe fight, and that was in Cardiff, so if it ends up in London or Manchester then it's going to be even more.
"It's a huge fight. In Denmark, people say is it bigger than Calzaghe? I say yeah of course it is.
"It's a different time in his career, he needs to win. We've got the backdrop of what happened in the first fight, so it sets it all up for an absolute classic."
The 33-year-old previously fought in Britain in 2007, when he lost to Calzaghe in the Millennium Stadium.
Kessler beat the Nottingham fighter in their first match, which took place in Denmark.