We know what happens to Harry, Ron, and Hermione during their Seventh Year, but what about all the students that had to stay back at Hogwarts? How would they react to Snape as headmaster, and the Carrows teaching?
The students aren't going to take this new regime lying down! They're going to fight back!
Viva La Revolution isn't a completely dark and gloomy game, although it will have some dark aspects what with deatheaters taking over and all.