If you expect this movie answer the question "how do you live?", you may be disappointed. The movie only ask the question and you are the one who have the answer.
I found some homage for previous Ghibli movies. It's like Mr. Miyazaki hints at the possibility this is the last movie for him and his hope the animation industry has next future figures which don't follow his master pieces but younger people's original ones. The stones which are the keys at the last part might explain it.
Personally, I was very satisfied to watch this without any trailer and advertising in such an information society.
I found some homage for previous Ghibli movies. It's like Mr. Miyazaki hints at the possibility this is the last movie for him and his hope the animation industry has next future figures which don't follow his master pieces but younger people's original ones. The stones which are the keys at the last part might explain it.
Personally, I was very satisfied to watch this without any trailer and advertising in such an information society.