In recent forum posts by Meizu manager Mr. Wong, he revealed that M7 will most likely be skipped by Meizu who's next product after the Music Card will be the M8.
The Meizu M8 is going to be a music phone (57x105x11.5mm) for the GSM and TD networks with a 3.3-inch 720x480 pixel VGA+ touch sensitive screen, 3 mega-pixel camera, ARM11 CPU capable of recording video in 30FPS utilizing the entire screen resolution, Bluetooth and TV Out. Supposedly, it will also run the latest version of Microsoft's Windows for mobile devices; Windows CE 6.0. After the release of the official concept renders, the M8 has already been stamped as an Apple iPhone clone.
Currently, Meizu are still deciding whether or not to include WiFi and DMB functionality.
Also, aside from the new 8GB M6, a 6.9mm thin M6 is also in the works.