Earlier rumors about a Qualcomm-powered second-generation Nexus 7 tablet successor from ASUS could be right on the money, if a recent FCC listing holds water. A certain "ASUS Pad" model number K009 just cleared the US testing site packing a Qualcomm APQ-8064 S4 Pro quad-core, 1.5GHz processor with Adreno graphics, front and rear cameras, 4,000 mAh Li-ion battery and LTE radios. Though no screen size is listed, the battery spec points to a 7-inch model -- the Nexus 10 has a 9,000 mAh battery, for instance. On the other hand, a rear camera, like the 5-megapixel model shown above, would be a refreshing addition to the Nexus 7, which sorely lacks in that department. Most intriguingly, ASUS listed the model as a Nexus "for marketing purpose(s)" -- though another K008 model also set the Nexus grapevine aflame when it hit the Bluetooth SIG, meaning skepticism should rule until we hear it from the horse's mouth.