AngryTownsman’s review published on Letterboxd :
This is the best DC movie since the Dark Knight, in my opinion. Easily blows away Man of Steel and Batman v Superman.
We are introduced to Dianna as a child. The only child on Themyscira. Literally portrayed as a paradise island - protected by a magical barrier. We see her learning the art of war from her fellow Amazons as she grows older.
The Captain Steve Trevor crashes his plane into the waters off the coast of Themyscira. Steve's entry to the island ultimately leads to Dianna joining him in "Man's World". His mission - to stop a new deadly gas attack that is not stopped by gas masks. Her mission - to kill Ares, god of war.
The movie starts out light in tone, but gradually darkens. First as Diana leaves the bright colors of Themyscira and enters the grey fog of London. And from there to the horrors of World War 1.
Any more would totally spoil the movie. And you should see this one in theaters.
I would say that Wonder Woman earns the dark tone it holds. It is set during World War 1, after all. But it does get back to a lighter tone at the very end. Not quite as bright as it was before Dianna experienced war firsthand, but not as dark as wartime.
Wonder Woman has taken some of the trepidation I felt for the upcoming Justice League movie away.