Based on your experience, it may be slightly off putting as it will be a departure from the game and the cartoon by quite a bit. That is true for any of the movies though as the game and cartoon were so different in comparison.

It is a good movie and features more of that "aliens among us" universe that I too find so interesting. It is much more subtle in International than it was in the first Men in Black movie.

Please update us with your thoughts on it when you see it.