Don’t bet on it, if they ruled that congress has no right to define the meaning of natural born citizen, then the current President would not be one either and all 8 years of his actions would be void....
This is a non starter, though it could be political theater, I can’t see any way you can argue the legislative branch cannot legislate... which is effectively what it exists to do.
Let’s puzzle it through. Chester A. Arthur was in the same position.
Suppose they say such a person can’t be President. This doesn’t invalidate anything that can’t be rolled back, at the least. What would the Court say applies to a defacto anarchic period of America? I think we know what’s coming. IT would declare itself to be the Law. And to vote to accept all of Barack’s proceedings would be a no brainer.
Or, dejure (and other adjustments made as needed)