That was pretty much in the original article already...
“The next step is the 3rd Circuit Court of Appeals and not the Supreme Court.”
Is that where they’ll hear Bill Andersons’ brief as well?
They've already read Anderson's brief. The rules of the Supreme Court require that all parties have 10 days advanced notice before an amicus brief is filed. When he filed his brief, Anderson requested that the rule be waived in this case. "The motion of Bill Anderson for leave to file a brief as amicus curiae is granted" means that the Court agreed to waive the deadline and accept his brief. "The petition for a writ of certiorari before judgment is denied" means it didn't make any difference. The court will not hear the matter. Not until lower court appeals are exhausted.