In The Incredibles, Frozone (Samuel L. Jackson), aka Lucius Best, is a long-time friend of the Parr family and also a superhero. His power is to freeze water on demand, and would probably get along alright with Iceman.
In Frozen, the regal and kind Elsa appears poised but struggles with a deep secret — her ability to create ice and snow. When she accidentally harms her little sister Anna, she begins to isolate herself. As her powers grow and her emotions run high, she unintentionally sets off an eternal winter.