Submitted on the briefs means that there will be no hearing / oral argument. The Court will issue it's ruling based only on the written briefs submitted by the parties.That usually means the decision will be issued faster, and that the court does not think it is a tough case.

Court of Appeals always has an option to decide a case based on the written briefs, without oral argument, if the Court believes that sufficient information is contained in the briefs and that oral argument is not likely to assist in making a decision. It usually means that the Court has given the case a preliminary review and already knows what the ruling will be.

It is very important to note that as a practical matter, oral argument usually doesn't have much influence on the outcome except in cases where unusual legal issues or significant public policy concerns are raised.

Have a good Day.