According to @upleaks, the next HTC flagship could launch in March 2015, although it's unclear whether this might be at Mobile World Congress or a standalone event, as was the case for the HTC One M7 and M8. It's also reported that a "more affordable" version of the "Hima" device will be made available in China, with the codename "Hima_Ace" pointing to a HTC One E8-style handset.
As always, we're inclined to take rumors like this with a pinch of salt, especially since we're almost certainly a few months out from launch. In the meantime, hit the comments and let us know what you'd like to see in the next high-end HTC phone.