WW was in no way "unified in tone" with Snyder's dreary, unheroic angsty flicks.
Heroism is not sticking one's chest out, smiling while punching bad guys.
Wonder Woman is indeed unified in tone, as it was filled with equally relevant tone & darker implications from the start: the German attack on Themyscira (and the death of Diana's aunt). to Diana desperately wanting--and getting to wage war at every stop among the hopeless backdrop of WW1, which could not be softened, or made into the cartoon "conflict" seen in the
Avengers movies. More than the acts of violence, the heroine was constantly faced with reality checks which melted her belief that men could be convinced to lay down their arms. Ares or no Ares, that's a
running theme throughout the film--one which Trevor had to yell into her when she was perplexed that Ludendorff's (and ultimately Ares') death
did not change anything about war or the men fighting it--a fact she will see over the off-screen, Ares influence-free century leading to her present day encounter with Superman & Batman.
Diana's personality and growth are in no way similar to Reeve's Superman--he's not having his world view constantly challenged, or modified, but uses it as a force against said challenges. As in my review, she is paralleled (in near endless ways) with the MCU Captain America, as he--after sacrificing himself in the ice believing he was working for the greater good--wakes up 70 years later, only to discover the so-called good guys (SHIELD) are almost as corrupt as the bad guys--and that's without the influence of Hydra within the organization. As a result of having seen the true nature of things around him--
Steve's attitude in
The Winter Soldier and
Civil War is one of a
slightly condescending
expectation of mankind continuing to manipulate, threaten and oppress. He's clearly world weary (with no overt happy disposition), but will retain his moral center in order to do his part.
Similarly--
Diana's attitude in
Dawn of Justice is one of a
slightly condescending
expectation of mankind continuing to manipulate, threaten and oppress. She's clearly world weary (with no overt happy disposition), but will retain her moral center (like this DC film universe's Superman) in order to do her part.
There's no "grinning warrior" (like some episode of the
Super Friends) as the characters move through the films. That's realistic, natural growth (as much as that happens in a superhero film).
It is no wonder the Cap films are so well received: they are free of the
G.I. Joe / Transformers cartoons style of over-the-top theatrics and tossing in everything
including the kitchen sink just say they've made a spectacle. The DC films (with
Suicide Squad being the lone exception) established a world and tone that never runs away from the fantastic source, but places it in situations that feel not only exciting, but thought-provoking in dealing with serious subject matter--like the MCU's finest, the Captain America films.