I don't see gamefreak giving a free update for post game content. But i think it is pretty suspicious we only have 3 legendaries this gen.. like not even ones from the past generations so i'm pretty sure we will atleast have that for free, hopefully not just a gift but a full on event that would be cool.
Also those home/sleep thing we will probably have some news about that. Maybe a new spinoff game too aka Detective or Mystery Dungeon.