At least four justices agree to hear the case and there has been a bit of controversy about Jackson. Because at least four justices agreed to hear the case there is a strong that the defendant in the case will have his conviction reversed which would lead me to think the court will come out in support of Jackson.
Calling for briefs will help the court look at outside views of Jackson. Having read all the briefs in the case. the arguments for upholding Jackson are much stronger than the couple supporting the overturning of Jackson.
I believe the members of the court will see, if they already don’t, that reversing Jackson will create a nightmare in the courts and a great deal of future difficult cases that will overload the courts even more than they already are.
True, four justices had to have agreed to hear his appeal in the first place and the Court more often reverses than affirms.. I still respectfully disagree with you though about what the Court’s call for briefs on the issue likely means. I think it’ll be 5-4 either way with the familiar scenario of Kennedy as the swing vote.