There are two reasons why you should watch this movie: A if you are wondering who is that ant man that appears in other avengers' movies B if you have watched the first movie and you were hoping that they might have improved this one. And there are two reasons why you shouldn't watch this: A if you find it just rediculous that there is a man who rides ants or is a super hero that the only thing he does is to call ants and grow small or large. If this was only a comedy, or a parody of the superhero movies, than yes, this one will be interesting. But if you think that it takes itself too seriously, than don't watch it. B if you can't remember what happened in the first movie. The first ant man film was actually it's best, so if you find it that forgetable, than this one will be even more so.