Since this would fall under the phablet category, one can expect it to come with a 5.5” display at the very least, and who knows? HTC might just go do something crazy and roll out a far larger display than expected. If the rumored HTC One (M8) Max were to arrive with a larger screen and a faster processor, it might just be a worthy competitor to the upcoming Samsung Galaxy Note 4, considering how there is a very high probability of the HTC One (M8) Max sporting the trademark aluminum casing that HTC’s recent flagship products carry.
Do take all that you have read above with a pinch of salt though, until something official comes about.