I read in an interview of Montezemolo that Maserati's 3rd model after the 4200 and the quattroporte will be a "leisure vehicule" he insisted that it will not be an SUV though.
Maybe something along the line of an Audi allroad RS6 "a la" Maserati
Anyway he mentionned it'll be styled but Giugiaro.
Interview available in one of the recent Autocar (UK)
Fanch.