Again, has it been confirmed that it's based on the 300 (LX) platform? The only thing I've seen that my point that way is the use of the 300's interior in test mules, which doesn't say yay or nay on being based on the 300. The onky thing I've heard so far is the potential of a turbo V6, based on a Chrysler unit that's essentially being re-furbed by the good folks in Maranello. Unless I hear otherwise or actually see a derivative of a Chrsyler interior in the final product, I think throwing in the towel is a bit premature.
That said, I will say this though...if FIAT is dumb enough to bastardize the Maserati brand by gussying a whole lot of Chrysler bits, they might as well give away the money dedicated in development and construction of the car. It'll be a waste of time to build it and a sore point for all us car enthusiasts. And if that is the case, then FIAT is keeping the streak alive with woth their penchant for killing off esteemed marques like ALFA Romeo and Lancia.