Why the movie name change?
Revolt! Does it mean anyway?
It could be a revolt by people to refuse to accept the authority of the alien invasion. Or acturally Bo was an alien, a prisoner of war, who was taken prisoner and had been brainwashed by the people military. Before he discoverd his true identity, he had got along with people for a long time. Final he betrayed aliens and join the people resistance.
This is just my guess. :)