Mark 13:25 And the stars of heaven shall fall, and the powers that are in heaven shall be shaken.

What exactly does, “the powers that are in heaven shall be shaken”, mean?

Is it referring to the principalities and powers that are still in the heavenlies until Revelation 12?

Revelation 12:9 And the great dragon was cast out, that old serpent, called the Devil, and Satan, which deceiveth the whole world: he was cast out into the earth, and his angels were cast out with him.