“I haven't seen a fighter as popular in his home city since Ricky Hatton”
And it is this cross-over appeal that Hearn hopes to tap into, beginning with the hugely ambitious debut show in Hull, planned for either 6 or 13 July.
"The performances he put in to win that Olympic title, under the pressure of being at home, were unbelievable," Hearn told BBC Sport.
"He was hardly ever in a close fight, he won the gold medal with ease.
"Then you look at the appeal that he has, not just in his home city of Hull, but all over the country because of the coverage he received at the Olympics and being on
Dancing On Ice.
"I haven't seen a fighter as popular in his home city since Ricky Hatton. And it's so diverse, from young children to old ladies to middle-aged men. That leads me to believe he's going to have a huge fan base.
"If you don't live the dream how can you sell it? We believe this is going to work - 20,000 turned up just at Hull City Hall to see him wave his gold medal."
Campbell said other promoters were keen for his signature, including premier American outfit Golden Boy, but that Hearn's deal with Sky Sports was the clincher.
"If I'm capable of getting to the top, these are the guys who are going to get me there," said Campbell, who won bantamweight gold in London but plans to fight as a super-featherweight or lightweight as a pro.
"Boxing is about being entertaining and I want to entertain the fans with great shows. Something like this has never been done before, an open-air stadium for a professional debut, with 20,000 seats. It's going to be a brilliant event."
Meanwhile, Campbell admitted it would be something of a relief to be able to demonstrate to the British public the trade he is actually trained in.
Olympics boxing: Luke Campbell wins Great Britain's second boxing gold
"An old lady came up to me recently and said: 'My friend said you got to the Dancing On Ice final so I'd just like to shake your hand and say well done.'
"I said to her: 'I'd rather you came up to me and said well done on becoming an Olympic champion!' It's great to have all these new fans, but my passion lies in boxing. This is the sport I love and the sport I want to be the best at."
Meanwhile, Hearn admitted his Matchroom was getting to its "maximum capacity" and that he would soon be "shutting up shop".
Campbell follows WBO lightweight champion Ricky Burns, unbeaten super-middleweight George Groves and British and Commonwealth featherweight champion Lee Selby in joining Hearn's team.
"Perhaps we'll sign one or two more in the next two or three weeks. At the moment we can deliver on all our promises to our fighters and I won't sign a fighter if I can't. At the moment everything's great, everything's rosy."
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