I'd lose my shit if they'd announce Sagat and he'd have good zoning.
Probably Capcom gonna put him in S3 more because requests than a really necessity. I think some characters are too hard for them to balance,Sagat could be one of them. Think about it,you want a sorry ass version of the king just to make him fit into SFV? For the same reason I'm not waiting for Makoto anymore,Juri and Alex SFV versions are perfect examples about when a returning OG goes wrong.
Sagat has worked fine in games without being primarily a zoner. He is an archetype impossible to make weak. Makoto is also perfect for this game.