It’s kind of dumb, but it’s a lot of fun. It follows in the steps of Ant-Man, where it keeps to its own rules for the main storyline but abandons them when it wants to make a joke. That being said the jokes land, for the most part, and it’s flashily cinematic in all the usual places. Instead of having a boring, predictable plot it changes up the formula by keeping the audience guessing which of the myriad tropes they’re going to fall into. This is the least weird and most stylish of the Men In Black franchise, and the second best one of the lot because of it.
Closest comparison: Thor and Valkyrie in a buddy cop movie with aliens.
Setting: Weird Sci-Fi
Plot: Buddy Cop
Tone: Comedy