This is not a ceasefire, obviously, no matter what Trump 🍊 says.
(By calling it a ceasefire, he has avoided obtaining congressional approval as required by the War Powers Resolution).
This headline is pretty misleading and the article glosses over the critical point: Exactly how does it imagine the controversy getting to the Supreme Court in the first place?
Without a path for someone to actually bring a case before the Court the Court lacks the authority to "upend Congress power". So no, it's unlikely that the headline is correct.
And it goes even more off the rails from there. Even IF SCOTUS addressed the WPA, which is not explained how that would be but IF, it would likely magnify, not upend, "Congress power" since the WPA itself moves power from Congress to the Executive.
Really this comes down to public misunderstanding of presidential power to engage in war. The power rests in Congress. WPA can't legally change that, but we accept that it did.