All nine justices of the current SCOTUS took two oaths before being seated: a Constitutional Oath and a Jucicial Oath.

https://www.supremecourt.gov/about/oath/oathsofthecurrentcourt.aspx

“I, _________, do solemnly swear (or affirm) that I will support and defend the Constitution of the United States against all enemies, foreign and domestic; that I will bear true faith and allegiance to the same; that I take this obligation freely, without any mental reservation or purpose of evasion; and that I will well and faithfully discharge the duties of the office on which I am about to enter. So help me God.”

And:

“I, _________, do solemnly swear or affirm that I will administer justice without respect to persons, and do equal right to the poor and to the rich, and that I will faithfully and impartially discharge and perform all the duties incumbent upon me as _________, according to the best of my abilities and understanding, agreeably to the constitution and laws of the United States. So help me God.”

So they are under the same gun the Congress is under. If they violate their oaths of office that would be treason and treason is punishable by death.

It will be difficult for them to decline to hear Brunson v Adams and when it is heard it will be difficult for them to fail to affirm Brunson's claim that much of Congress (and others) violated their oaths.

They are intelligent - if nothing else - and they are perfectly capable of full consideration of potential consequences. They will do that carefully.

So I believe it's game on.