This case goes fundamentally to 1) the primacy of the Constitution over the Executive Branch using the clearest terms and facts possible; AND 2) the ultimate ability of the USSC to assert authority over the Executive Branch through the Court's role as Guardian of the US Constitution. Of course, there have been cases touching on these issues before, however, the bright line precedent that would arise out of this fact pattern provides an opportunity to reinforce the Court's authority over the other Branches in an unmistakable way.
Basically, this is a straight-up mano y mano conflict between the Exec. and the Legis. that the USSC will use to strengthen its power, which is the most important thing, after all.
All of these "informed individuals" claiming with certainty their predictions, are specious at best.
I have no idea how this will turn out, however there is no question that this is unprecedented.