There are some very talented people working on it, and I am sure it will be a great firework show. However, it is not going to be the massive and complex spectacle that Harmonious was. It will be interested to see how it is received and how it will shape things going forward.
If they get the music right, I don't personally think they need all the hoopla. It was the music that gave such emotion to Illuminations, which was basically just a great fireworks show. I know it's not supposed to be an original score (I think), but maybe they can still give us something wonderful.