Well, Hyper you where basically only saying 'Sheik = Zelda in Smash so Sheik STAYS Zelda in Smash' as your main argument. So yeah, I didn't bother too much replying to your argument. See what you mean right now though, but I honestly doubt that Ghirahim would make it, and Impa not. At least, I don't expect to ever see the combination of Ghirahim and Sheik. If they gonna go SS-style, we'll most likely get Impa. Why? Cause with Sheik, they already have a good base character for a moveset.
What scares me however is a Zelda roster with Ghirahim, Tingle and Sheik. 3 of the most... controversial Zelda characters ever, in one game. Paranoid parents would ban the **** out of Zelda games for their children forever.
Personally, what I'd like most is:
Link (plays a bit lke a heavier Toon Link- SS-style, with Skyward Strike for Side B)
Zelda / Impa (a few duo moves)
Ganondorf (OoT3DS style, moveset revamp based on OoT boss fight)
Young Link (MM-styled, with no masks however. Keeps the classic 'bomb, arrow, boomerang'-playstyle)
Skull Kid (**** yeah, Skull Kid. Even has some TP-based moves with that flute and puppets)
*Ghirahim* (depending on ammount of Mario characters / ammount of playble characters in general)
Only seems likely if MM gets a remake, which I doubt. But this is what I would think is ideally, to my preferences. A more likely scenario:
Link
Zelda
Impa
Ghirahim
Ganondorf