Yes, Marbury established the principle of judicial review over statutory law. That’s the question here, except in this case it’s interpretation of The Constitution, exclusive prerogative at end of the day of the SC. Open and shut.
The problem is that this is not a legal question. There are a few things that are internal to Congress, which the Supreme Court admits it has no oversight over. Impeachment, rules of the Congress, and expelling members of Congress.
If the Supreme Court could reverse impeachments, and there were four Supreme Court justices impeached, they could just reverse those impeachments. Impeachment is the only legal way to remove a Supreme Court justice, so that would be a real problem.