Justice League (2017) is a mess. But then it has these great "actually, some of us know what the DCU looks like and what makes it work" moments.
This bit is a post start-of-credits scene, but one of two. It's also my favorite part of the movie and why I'll likely be back if this is where the movies are headed.
I just want to contrast this with the incredibly murder-y Batman meeting Superman. BTW, Superman was just letting Batman murder people, like, eight seconds before so he could work in a cool pose. And, then, later, Batman tries very hard to murder Superman.
A lot of Justice League is unearned - like anyone missing Superman when his very presence just destroyed Metropolis twice. But Henry Cavill very clearly always had an idea of how his Superman could work, and it's a lot of fun to watch. A sort of dry humor that plays off how seriously everyone takes him. His take in this movie, when he finally gets to show up, matches the character of the comics surprisingly well.
Their Flash is basically Wally West, and I don't get why they jettisoned everything about Barry Allen that's been established for decades, but he's our kid on the learning curve, and that's sort of fun.
And one of the most DC things you can do is ask Superman and Flash to race, so - thanks, movie!