The federal govt is no longer authorizing nationwide abortions so it has been remainded back to the States. Garlan has no part in any of this, unless he puts DOJ guards on illegal abortion clinics in certain states.
In fact, Clearance Thomas is going to review many cases where Constitution Law was improperly applied to grant a right and reverse them, one by one.
This is why the Left hates Thomas, he is undoing the Federal Fifedom and returning enforcement to the States on a host of matters, pertaining to prior SCOTUS rulings.
It takes four justices to accept the case for review, and five to form on majority to overturn a prior decision. Clarence Thomas' dissent, though persuasive, was not signed on to by any other justices.
I wouldn't get my hopes up.