Big summer movies are usually part of something bigger now

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School’s out for summer. Unless you’re going to the movies.

Instead of offering an escape, these days too many would-be warm-weather blockbusters are assigning serious homework. New chapters in never-ending narratives, stories that require a deep-dive knowledge not only of the original franchise but all its other spinoffs … these pictures demand that you study. Because there will be a quiz.

OK, perhaps you remember enough of “Mission: Impossible — Dead Reckoning, Part I” to bluff your way through “Mission: Impossible — The Final Reckoning.” But unless you have an amazing memory, other late-to-the-game sequels may leave you lost.

After all, the new “Freakier…