Mazda has some big plans in store for the next 6 due out in 2013 and one of those could be a coupe version.
A source tells What Car? that Mazda is planning a coupe version of the 6 to come out in 2014, a year after the sedan. The car will make use of Mazda's SkyActiv technologies; including engines, transmissions, and weight saving designs.
The question is though, will the US see this. The first Mazda6 introduced back in 2003 was offered in sedan, five-door hatchback, and wagon. The current 6 is only offered as a sedan, while the rest of the world gets a wagon version.
Source: What Car?