The evidence behind this assertion? An import listing on Indian customs database Zauba, which has rarely been proven to be wrong. The smartphone in particular would bring with it a model number SM-C5000, where it will boast of a 5.2” display, but other than that, there is nothing else that we know of it. Other sources do claim that there is a C7000 model that is in the pipeline, although the screen size of that particular device has yet to be determined.
Perhaps the C Series will target the Chinese market as its primary base, although this does not mean that it cannot be sold elsewhere. I suppose we will simply need to play the patience card until Samsung decides to reveal more on the matter.