The Partenopei chief has revealed the club are set to complete deals for two big-name players by Monday
Higuain, 25, has long been linked with a move to Arsenal but the Serie A outfit have beaten the Gunners to his signature after the Real Madrid striker successfully completed a medical prior to a reported €35 million move.
The Partenopei are also set to complete what is believed to be a season-long loan deal for 30-year-old Liverpool goalkeeper Reina, following the Reds' signing of Simon Mignolet, with De Laurentiis revealing that both transfers could be completed by Monday.
He wrote on his official Twitter page: "Higuain and Reina passed medicals and will join group very soon.
"Monday night we will make a big party at San Paolo. You will know new players and more.
"You will discover the new jerseys and listen to the new hymn, a remake of 'O Surdato 'nnamurato' and watch the new Napoli cheerleaders.
"We can say we have worked a lot but we will not stop here."
De Laurentiis recently revealed that coach Rafa Benitez has €124 million to spend following the €64m sale of striker Edinson Cavani to Paris Saint-Germain.
The Spaniard has already been busy in the summer transfer window after completing deals for Dries Mertens, Raul Albiol and Jose Callejon, as he bids to make a flying start to life at Napoli having joined the club in June.