The Partenopei chief has revealed the club is 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 has pipped the Gunners to his signature after the Argentina international successfully completed a medical prior to a reported 35 million euro move.
The Partenopei are also set to complete what is believed to be a season-long loan deal for 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 euros to spend following the 64 million euro 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.