Looks like HTC is working on Mid-Range Smartphone for the Desire family. Its codename is "HTC A11". We got the first leaked photos of an A11 proto-type.
The A11 is going to be a mid-range offering, but one that will come with a 64-bit chipset, which will be the Qualcomm's Snapdragon 410 (MSM8916). This is the first ever 64-bit SoC from Qualcomm, and it was unveiled in December of last year. It has a 1.4 GHz quad-core Cortex-A53 CPU, and an Adreno 306 GPU.
HTC's upcoming handset will also sport a 4.7-inch FWVGA (480x854) touchscreen, a 5 MP rear camera sans LED flash, and a VGA front snapper. It shall run Android 4.4.2 KitKat with an HTC overlay on top. As you can see from the images above, it won't have dual front-facing speakers like higher-end devices in HTC's portfolio.