HTC has reconsidered the naming policy for its products and is considering to discontinued with serial numbering like M8 etc and now is not calling M9 to its new flagship; it would rather be called HTC Hima which is about to appear in the market in March 2015. There is no official confirmation about this and it is only through leaks we gather this idea about HTC Hima and other devices yet to come from HTC.
Hima will be launched globally and al four major carrier companies of USA will be offering this device but Hima Ultra will be offered exclusively by AT&T and Verizon. We still do not know the exact difference between HTC Hima and its variant, Hima Ultra but it is only a guess that the later will be bigger in size as Max is compared to the regular HTC One. There is another variation in models and that one is known as HTC Hima Ace which is going to be slightly cheaper than HTC Hima.
HTC Hima which is the regular version of the device will be equipped with 5 inch 1080p display, a 20.7 MP rear camera, 64-bit Snapdragon 810 processor, 3 GB of RAM, and a 2840 mAh battery. It is further known through some source that HTC Hima will be having HTC RE2 camera and would be coming in the market. Beside this HTC is also launching HTC butterfly 3, the replacement an upgraded version of Butterfly 2. Some tablets are also on the list and maybe the next Nexus 9 tablet will be modified with HTC Sense. Here is a bit more of information that HTC Hima will have Sense 7.0 users interface and being a flagship HTC is considering giving it a new user interface that is Sense 7.0.
All this information is based on rumors and there is no official confirmation about them but thay have some reality in it because the rumors originated from some reliable leak.