HTC would be holding a press statement sometime around 8th of October but some pre-press leaks of a similar build and probably specs of the previous HTC One M8 called HTC One M8 or the HTC Eye or if I may, HTC One Eye – did somebody say cyclops? may be unveiled during their October 8th press briefing.
HTC One M8
The HTC One Eye, sorry HTC M8 Eye as we hear from phonearena would come with a close resemblance to the previous M8 but a difference in inches and probably camera. The phone was rumored as a version of the HTC One (M8) in which the 4MP ultrapixel Duo camera is replaced with a 13MP Duo Camera.

As we said before, the M8 Eye and the previous M8 would have same kind of specs but just a revamped and better camera and a bigger 5.2″ screen.
http://www.techiedup.com/2014/10/htc-one-might-fraternal-twin-called-htc-eye-htc-m8-eye/