Going back to Season 4, and Frozen, look what I found in April 7/14 Entertainment magazine.
Page 97
Frozen: The Ending You Never Saw
An Evil Elsa, Snow Monsters, and an Avalanche!
That list nutshells just a few of the possible endings for 2013's Frozen. The animated blockbuster underwent a herculean creative process as Disney's story team, led by producer Peter Del Vecho and director Christ Buck and Jennifer Lee, considered numerous iterations of a tale based loosely on Han Christian Andersen's "The Snow Queen."
No longer quoting:
Elsa and Anna weren't sisters or even royal.
Elsa froze her own heart when she was stood up at the altar on her wedding day.
Elsa froze her heart so she would never again love.
Final act:
battle between misfit snowmen and guards
Hans triggering an avalanche that threatens to destroy Arrendelle.
Anna unfreezing Elsa's heart to save the kingdom and love again.
Any sound at least a little familiar?