I think the biggest failure of modern DC films is also the reason why the wonder woman movie is so great. Superhero films arent about hte heros or the action scenes, its about providing a beacon of hope in dark times, to be an inspiration to people to be a better person. With most of the DC films being dark and gritty, that kind of gets lost. The people no longer look up to batman as a hero, they look up to him in fear. Same with superman. But thats why wonder woman was so great because she WAS hope in such a horrible time. She WAS a source of inspiration to the other characters to be better. She is the only modern DC film to understand what it means to be a hero