I'm sorry but for a long time Doraemon fan this doesn't surprise me. Delight, yes, because it wraps up the story very nicely. But every single point in the movie you can find scattered all over the comic book, the movie was just collecting the bits from the comic book and bundle it into one and make a nice graphic for it. But it's really NOT anything new. It's a story all of us has already known before. I rated it 6/10 not because I don't like the story, because everyone who loves Doraemon can't possibly NOT love the story. But I don't like the fact that they didn't give me something new which I looked forward too. Also, the way it was presented was so over-the-top. I usually felt some emotion watching any of Doraemon's adventure movie series, like Doraemon and Dinosaurs, or Doraemon in the Animal Kingdom, in Robot World, etc. Even I can feel something in the normal weekly series. But because Stand By Me is very over-the-top, I can't believe the flow of the emotion one bit. It didn't get to me. This speaks volume since I'm a super crybaby and even nowadays I can still cry watching mere commercials!
Oh by the way, I'm 31, and have been watching Doraemon since I was Nobita's age.