Ok, bumping this by the request of FalKoopa, cause I keep flooding the 'Rate their changes' thread with Impa posts. Here's a little post I made today:
Impa would probably be a separate character. Makes the most sence to revamp the whole Zelda / Sheik thing. Sure, SS Zelda and Impa could be a tag-team, but that only ADDS to the reason I think Impa is the better choice overall.
Overall, it would be enough to call it a 'replacement' if Impa is there, but Sheik isn't. Consider it a change like Young Link -> Toon Link. Why aren't people going 'MUH MAJORA' or 'MUH FIRST 3D CHILD LINK' on Young Link? Cause it's been done, and accepted that's why. In all actuality, Sheik and Impa have the potential to be as different as say, Lucario and Mewtwo. But as Sheik has a completely made up moveset, Impa borrowing a few of them isn't as farfetched. Especially as Impa has shown fighting abilities on screen in SS, Sheik never did.
This is turning in a bigger rant than I wanted already. Anyway, untill I see Sheik announced on SmashBros.com -which I wouldn't expect, as TOON LINK got shown before Zelda already, which to me hints on big changes for Zelda- I won't back up on this statement.
People have their rights to PREFER Sheik, I have my rights to declare why I think Impa is a better character, and a overall better choice for a Smash Bros. character than Sheik.
Seeing as in the same thread, people are ranking Sheik higher than MEWTWO (with 3%, but still) with an attitude of 'I expect what has been done already' I find it now more pressing than ever to rather people of similar minds into this thread.
Yes, Impa's next role in Zelda 3DS is as her old self again, this is nothing to worry about however. As Sakurai would probably base Impa of Skyward Sword anyway. Link to the Past 2 will likely get NO content in Smash whatsoever, yet Impa appearing as her young warrior self also shouldn't be ruled out yet, considering the Dark World (with a new name I refuse to accept).
Soldiers of the Superiour Sheikah, I call on you. Should Skyward Sword's Impa make a solo appearance alongside Link, Zelda, Ganondorf and Toon Link instead of coupling Sheik with Zelda? I'd like to hear more opinions on this. Me personally, I think the fact that Toon Link has been announced before Zelda (or Zelda / Sheik) means that Zelda could probably see quite some changes in her playstyle and moveset this time.
Zelda is one of the more likely characters to get revealed to, next to the likes of Wario, Diddy, Yoshi or MetaKnight / King Dedede. Like with Brawl's Dojo, likely Sheik won't be featured in the same update. Hence the speculation here. Anyone still fighting for Impa behind the scenes? Let us know!