This film is a perfect case for why Hollywood isn’t doing well at the box office. The film takes a franchise of two good films and regurgitates generic Hollywood crap.
The dialogue in this film is full of cliché statements, and corny attempts at statements with deep meaning.. The dialogue sounds like the script of a novice, offering nothing to the characters.
Another failure of the film is character development. While the comics provide histories for the characters, none is given for the newly introduced characters. The viewer is left to simply accept the character at face value, without any explanation for their character, their history, or their power. Even the developed characters lack any depth of the previous films.
Overall the story seems rushed. The director seems to push the film forward through the action and thus the film suffers.
If you like the first two films then I would suggest not seeing this one. You would miss nothing.