Who said sedans are trailing off? Apparently, not Nissan.

In fact, they'll be unveiling an all-new four-door in about two weeks in Shanghai. However, they haven't actually said what it would be. Guessing game anyone? We reckon there are two prime candidates.

Our first bet is the next-generation Sentra/Sylphy. Photos of it completely undisguised were leaked earlier this year. So why do we reckon it will be the Civic fighter? Looking at the photos from the January post, the car had a simplified Mandarin badge on the right hand side of the trunklid. Also, the supposed source of the photo leak comes from China. Curiously, there isn't much buzz surrounding it in the official Nissan China website. Perhaps that market isn't the one for putting out teasers before the grand reveal.

If it will be the Sentra/Sylphy, what will it be like? As shown a couple of months ago, the new C-segment sedan sees a lot of influences from its big brother, the Altima. There's the V-Motion grill, slim upswept headlights, defined bumper corners, and a sharp-looking apron. A Chinese motoring website is also claiming that they have the dimensions of the car, measuring in at 4,641 mm long, 1,815 mm wide, and 1,450 mm tall. Full specifications are unknown at the time of writing.

The second bet is the 2020 Almera, which is called Sunny in China. Unlike the Sentra/Sylphy, the future Almera is seeing a bit more buzz in the West. In fact, Nissan USA announced that the subcompact sedan, called Versa over there, will make its world debut next Friday, April 12. It is possible that after its launch in the West, China will serve as its launchpad in the East.

Whatever the car may be, either one will inject new blood in the current Nissan sedan range worldwide. Both the Sentra and Almera have been in the market for quite some time already, and a clean-sheet redesign could help boost their appeal.