It’s actually a fairly dark song, as Elsa seems to come to the conclusion that she needs to kill herself, as it’s the only way she can think of that will free the world of her power.
The tweet sent out by Disney Music is only a small taste of the brand new song.
One assumes that the arrival of Hans and company ends up putting a stop to these plans.
However, it includes links to Spotify and Apple Music, where the complete song is available to for listening.