Superman is the best hero there is first of all. Just start from that.
Love Wonder Woman. I really like this version of the Flash.
The backstories on Cyborg and the Flash make the movie so much better.
The stupid stuff that Whedon put in like the flash falling on top of Wonder Woman while she lays on her back being removed is a relief. This is a real movie that does that characters justice (pun intended). Whedon's stuff with marvel is garbage, and what he did with Justice League was garbage. Love this movie.