The beginning was nostalgic for sure, However it was disappointing relative to the first film. Of course i am not a kid anymore but i enjoy the first movie more even now and found myself revisiting those songs while the new songs had no impression whatsoever on me after watching the film.
They tried to do a lot in a short time, you can see it was cut down from a TV show, that it left no time for anything to make sense, even for a kid (i went to watch it with my younger sibling)