Sometimes the people who make movies are stupid and the fans know better at how to end them. Here, state any movies, tv shows, video games, or anything else with a plot that would be improved with a different ending.
As Always there are spoilers
 
Brave-
Start after the mother kills the other bear. The sun comes up and she doesnt turn back. The daughter hugs the mother adn begins to cry. the mother huggs her back. The mother's pupils dialate as she turns mentally into a bear. Mother kills daughter. Father kills mother as a bear. Mother turns back into a human. Father cries over her dead body.
The Legend of Korra-
Start where korra is crying over the cliff overlooking the ocean. Korra jumps off the cliff to kill herself. Right before she dies she goes into avatar state. Everything that actually happend when Korra gets her bending back happens in the next season
To be continued-