There was a lot of trolls. There was a train that sang. And that bad troll stole the sun. The train and the good good trolls were trying to save the sun. They sang Queen songs while trying to do so. If someone knows, this will be SOOOO appreciated!!

Possibly Trollies Musical Adventures

Nooo. /: That isn't it.

Are you sure?

"...also deals with an arch-nemesis bad guy, in a far-away underground castle-like lair, concocting plans (to be carried out by his bumbling minions) to steal the most precious object of the "good-guys" world; this time its the Sun from the sky itself."

"...about bad guys who try to take away the sun in order to scare the happy, friendly guys."

If not, can you add any more info?

As far as I can tell Quinn seems to be correct. Perhaps the videos on Youtube will help: YouTube - ‪WE WILL ROCK YOU from Trollies Musical Adventure‬‏