I don't know, I ended up having several hundred questions by the end because of all the stupid decisions the characters make (including: why do the killers spend a whole purge terrorizing this one family when they could be killing several hobos? Why does the family keep splitting up? Why does the son let that bloody homeless dude into the house, or better yet, why does he even know the password to unlock the security system? Was this his first purge? In fact, what is the point of the purge when unemployment is like 1%, when most crime is brought on by poverty and not because everyone has a crazy killer holed up inside of them that needs to be released once a year?).
Maybe this new movie answers those questions, but I can't muster up any reason to care.