"He will be young and have few losses. If he [Tua] needed any more motivation, that will be it.
"If David beats him then he will be close to another title shot. If he loses then he will probably retire."
Tua, who was unsuccessful with his world heavyweight title shot against Lennox Lewis in 2000, has retired a few times already and will need to work hard. Since his demolition of Cameron in the Fight of the Century, he has stepped into the ring four times - beating Demetrice King and Friday Ahunanya on points, and drawing and then losing to Monte Barrett in his last fight.
Higgins said the more professional set-up would make all the difference, however.
Tua would again have access to top sparring partners, which, with the contracting of Parore and signing of a credible opponent, means Duco will have to make a large investment.
"We're putting our money where our mouth is," Higgins said.
Duco hoped to announce Tua's opponent next month.
Parker, who recently turned 21, will lead the Tua fight undercard. Higgins said the South Aucklander would fight three times before the June bout - twice in New Zealand and once in Australia.
Parker, a leading new Zealand amateur, has three professional fights to his name, all of which resulted in comfortable victories. His last fight was against Richard Tutaki at last month's Fight for Life event in Auckland.