Is the new Supergirl film just John Wick in a cape?

From the trailer, the plot of the new Supergirl film looks incredibly similar to the first John Wick movie.

1. John Wick - John Wick's wife dies. He is sad and aimless. Some serious assholes kill his dog and he goes super badass killer to get revenge.
2. Supergirl - Kara Zor-El's planet dies. She is sad and aimless. Some serious assholes poison her dog and she goes super badass to find them, get revenge, and maybe/probably save the dog.

Am I way off with this?

I'm still probably going to see the film because it looks cool, I'm just wondering if anyone thinks maybe they could have tried a little harder with the premise for this film.