There is no way Sunset would have the opportunity to start her evil plan, since there wouldn't be any Element of Magic lying around to steal. It was hidden in the old castle and Twilight needed the magic of Friendship to obtain it.Same for sirens. The only reason they started coming up from the shadows was because they saw the opportunity of stealing equestrian magic, which wouldn't get to the human world without the plot of the first Equestria Girls.So… Lucky Equestria, fucked up only 7 times over?