Berardi will come when it is his time next year. Zaza was taken because we had the option and if he plays well he can be sold at a premium.
Arsenal is apparently enamored with him as a striker for their side.
From Goal.com:
"Arsenal will return with a bid for Simone Zaza in January. The Gunners had a last-minute move for the striker rejected by Juventus on deadline day, but can snap up the Italian either on loan, or for £22 million, come winter."