HTC is going to hold an event on September 19 in New York, and they might announce their first Windows Phone 8 device, Accord in it. But as per some news from CNET, HTC is not only announcing Accord in this event but they are planning to announce 2 tablets too.
HTC might announce an successor of its tab Flyer and a 10.1 inch tablet, Flyer 2 might have 7 inch screen, Qualcomm Snapdragon S4 processor, resolution of 1280×768 pixel, 3 MP rear camera and 1 MP front facing.
10.1 inch tablet specification are not known till now but @evleaks, the same user who had posted rendered image of Nokia Lumia 920 and 820 on his twitter account has posted an image which might be HTC 10.1 inch tab. As per image it seems that HTC has put rear camera at the bottom of tab.