The problem with Melee HD as a "hype," game is that when anyone posts about it they're going to get 500 replies from non-community members saying that they need to move on. Whereas if someone posts about HL3, even the people who didn't like HL2 at least understand why there needs to be a third game.
as soon as nintendo officially announces Melee HD the non-community members will be all over melee's dick
exact same thing happened with the gamecube controller before and after they announced the adapter. from "OMG just move on already the pro controller is fine" to "OMG nintendo is so awesome GC controller is the best thing ever for smash"