The answer very well can be "nothing" - that the bell is already rung, the glass is already broken, there's nothing to be done.

The issue may be moot if "glass is already broken", but that is not the case here. These men are not dead. They are sitting in prison.

In another thread, you said Trump backs down, when SCOTUS delivers an unambiguous order. For whatever reason, Google is not finding the exact case, so I can not read exactly what the court said. All I know is what the article linked to says, and what the net sifter says, that the court said the men have a right to legal due process. That seems unambiguous. But, the regime, in usual Trump fashion, is finding something to quibble about.

What this reminds me of, is the Bush regime's dance with prisoners at GITMO, nitpicking about how they were beyond the reach of US courts, or they were not entitled to due process, then the "military commissions" that were set up to give the color of due process were a farce because defense council was not allowed to see the prosecution's evidence. The men sat in GITMO for years, while case after case worked it's way up to SCOTUS. In the meantime, the Bush regime could show off the Islamic boogymen, sitting in prison, just as, now, the Trump regime can show off "illegals" sitting in prison. Noem even went down to CECOT to pose for publicity pictures with the prisoners. Maybe the publicity is the objective, to show how "strong" the regime is, and the men are simply expendable meat being used in pursuit of that objective?

Steve