Currently numerous Chinese news sites are taking great interest in its details, however all information is derived from photoshopped images of the car created by the UK magazine Auto Express. Insiders say it will look somewhat different to the current images and that there will also be styling differences between UK and Chinese versions of the car.
One thing that is known is that it will be based on the Roewe 550 and that following Roewe/MG integration they are expected to share a production line giving the "1 + 1 > 2" effect.
Reference: http://news.cheshi.com/gcxc/200902/90710.shtml