UPDATE: The 2014 Maserati Quattroporte has been revealed. Click here for all the photos and details.

Maserati is in the midst of an ambitious new model roll-out plan that will see the automaker’s lineup not only freshened but injected with some brand new models.

Fiat Group CEO Sergio Marchionne has expressed that he’d eventually like to see Maserati lift its annual sales to around 50,000 units, up from less than 10,000 last year.

To do so he plans to see the launch of not only a new Quattroporte, but also a ‘baby’ Maserati sedan similar in size to the BMW 5-Series and a luxurious SUV previewed by the latest Kubang concept car and based on Jeep Grand Cherokee running gear.

At the recent 2012 Paris Auto Show Maserati confirmed that its new baby sedan would revive the Ghibli name, while the SUV would be called the Levante. Both are expected in the next couple of years.

While we haven’t seen prototypes for these two models yet, we do have a new spy video of the next-generation Quattroporte, which is expected to debut at January’s 2013 Detroit Auto Show before going on sale shortly after as a 2014 model.

The video shows a heavily camouflaged prototype completing some high-speed runs on Germany’s Nürburgring race track. For a glimpse at what the final version may look like, click here for alleged patent drawings of the new Quattroporte.

In line with previous reports, Maserati is thought to have developed a new rear-wheel drive platform that will spawn this new Quattroporte as well as the smaller Ghibli sedan, and even the next-generation GranTurismo sports car. According to insider information, the new platform will make extensive use of lightweight aluminum and be capable of implementing a hybrid system Maserati is likely to borrow from Ferrari. Also borrowed from Ferrari will be the FF supercar’s complex all-wheel drive system, which is expected to feature as an option on both the new Quattroporte and smaller sedan further down the track.

As for the regular engine offerings in Maserati's new lineup, Ferrari is expected to remain the official supplier but instead of a sole V-8 there's a report suggesting a supercharged V-6 as well as a downsized twin-turbocharged V-8 is expected to feature. Ferrari's decision to build more engines for other companies, even if only fellow Fiat Group brands, is part of its overall strategy to grow its business without building more cars and diluting its exclusivity. The plan is said to be one of the wishes of Sergio Marchionne, and could even see a Ferrari-developed engine power some Alfa Romeo models.