No blacks on the jury will be their ticket. New trial with blacks seated will result in hung jury and no conviction.
There is no jury on a appeal. Also appeals are based on whether the law was followed. As far as I am aware the jury was properly seated. The potential black jurors who were struck were not struck because of their race but because the trial involved two students and those potential jurors were involved in a school system one way or another.
Not that K.A. legal team won’t try to use those grounds. I think it likely the defense will argue that the judge gave the jury the wrong instructions about the difference between finding for manslaughter or murder. Self defense (AFAIK) was not brought up as that would backfire on Anthony since he provoked the attack.