I liked the singing planet but wish they had leaned much harder into it.
When we arrive everyone is just standing around and don’t start singing until they notice the Marvels. I understand the reveal joke but they could have handled it better.
The prince being bilingual was fine.
However when it came to battle that should have been a huge musical number. It could have been an added step to the Marvels working in unison. Have them try to time things together but occasionally messing up. Then they could have hummed/sung along to get more in sync.