The Aeon is the trump of time and the changes dictated by the times, it addresses
finality and destruction as well as liberation, hope and redemption.
The Aeon is the symbol for the Rise of Phoenix, it stands for a time of insight, the true understanding of the circle of life, of growing and fading. The card tells us that we should leave our 'frog perspective' and watch the things from a higher level, that the time has come to face the new, that we need a good overview to build our 'Utopia'.
In older decks the Aeon is called 'Judgment', dealing with resurrection and redemption. The limitation of this view is the involuntary association to a 'court of law', to the Christian concept of a 'Resurrection' where the pious may rise and the rest must burn.
Although trump XX indeed does imply a judgement, it wouldn't be appropriate to restrict this meaning with such a superstitious simplification.
Drive: Birth, renewal, transformation, the realization of Utopia
Light: Knowledge of coherences, widened perception and the liberation of hidden abilities
Shadow: wrong indentification, self-deception