An image of a new HTC phone has recently surface on twitter in a tweet by Russian site HTCFamily.ru.
This new HTC phone, code named HTC M8, could be the successor to the HTC One since its casing is similar to HTC One.
Things that differentiate it from HTC One are two camera lenses with dual flash on the back.
The Russian site HTCfamily.ru also posted some schematic of the front of HTC M8 that tells that it might not have any physical buttons that we usually see in any smartphone for power on and off.
With Samsung preparing for Galaxy S5 and Apple possibly preparing for next iPhone, it completely makes sense for HTC to be working on their next flagship as well.