oh noes!

Mexico will be allowed to prepare a document!
Oh noes!

And a judge will read it?
Oh noes!

It's a brief. It is just a position paper that the judge will read. It does not mandate any action nor does it affect the court's duty. It is a piece of information, not an attack. Just an opinion on an issue. The judge can place any importance he or she wants or does not want on this brief.
What exactly is fox news trying to get people spun up about this time?