I think that chars with air dashes contest her zoning pretty well. thus I would consider supergirl, superman and firestorm slightly in their respective favour. chars that can low profile projectiles also zone her out, so deadshot and green arrow might be bad as well. besides i think that she does lose to batman.
scarecrow has great range and teleports, I don't see him losing to sf either. darkseid has every tool to contest her zoning. both opponents might be even or have the advantage.
cheetah is interesting. I haven't played one, but her jumping angle seems to get past sf-zoning.
green lantern relies heavily on his oki game and sf has great wakeups. I don't think that he wins this matchup.
while sf zoning is strong, people will eventually learn to deal with it. the strongest aspect is the fact that sf can hold trait to catch mb-rolls that stop in front of her. however once opponents roll behind her, she is in severe danger.
as with all zoning characters (not named zod): at the beginning they seem stronger than they really are. I expect her to end up mid tier.