Im sorry to have to say this but there is no way HTC would even care, nor would we get enough people to actually make this possible. But we do have some devs currently working on 4.4 for the legend.
Yeah, im not saying that it is impossible, in this case we are lucky we got a developer who is working on a KitKat port, but it is not officially from HTC and this is what the thread is about i guess.
I was just giving the link to the thread confirming your post .
But it is true that HTC won't do anything more for the Legend (which is normal regarding its age).