It's been a while since HTC's last Windows Phone release but if serial tipster @evleaks is to be believed we're going to be getting a new one. Without giving too much detail, the HTC W8 is the name and it's apparently heading for Verizon packing Windows Phone 8.1. And that's it.
Given what HTC has been producing in the Android space of late, we could speculate until we're blue in the face about whether it may or may not resemble a Windows Phone version of the HTC One M8 – which might not be such a bad thing at all – but we'll be keeping our eyes wide open for more on this going forward.
If this is true, and evleaks has a good record with this stuff, the W8 sounds like a WP version of the M8 to me.