It looks like Nokia still has a few variants of their Lumia line to release, with the latest earning the name Lumia 625. That low number means we’re looking at an entry level device, one that presumably would be like the Lumia 620 but perhaps sporting some new internals for radios, etc.
But according to a post on Tieba baidu, the upcoming device has some rather different specs and dimensions. Basically it’s a 4.7-inch WVGA device with no ClearBlack display and is roughly the size of the Lumia 920 and a 2000 mAh battery. No word on memory or CPU, though 1GHz and 512mb seem to be up for consideration.