So during the end of PotS IV, Lakshmi mentions that the people of the City have begun singing a song as of late, mentioning these very specific lyrics:
Rise up as one
March towards the sun
Seems pretty innocent at first, right?
Well, the main concern draws from HOW she says those words. To me (though sounding sped up and off-key), it seems to match the tempo of a song belonging to a very specific queen...