Very similair to my earlier question, however this deals with games that have new free content released later down the line, not paid DLC. Let's say, again like with the last question, you release new content that would push the game's rating to "Mature" when it was previously "Teen". The content is automatically added to the base game for free.
What would happen? Would the base game be pushed to the higher rating, since it now comes with more mature content, or will it not be updated at all? Or do I have to disclose the planned content to the ESRB in advance so they can already give me a higher rating than the base game would get? I don't want to hide anything, so I would give them that info if it was better in the long run.