The movie doesn't change in any way: no big changes in plot, no old characters re-appearing. It's not very thought provoking in that sense. We don't get to see what comes after the bad guys win; we don't even know if people can be hurt in this fight. This isn't a battle for survival in which no one can survive. The evil villain won and everyone just died. (So yes, it was stupid but not without good reason.)

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