There is a distinct possibility that the Triumph of the Immaculate Heart is referenced here, itself a foreshadowing of the Eternal Jerusalem. The only refuge from the minor judgement and chastisement to come will be the Catholic Church and in this way it is a microcosm of the final persecution and the Final Judgement.
I like it principally for its symmetry: Our Lord's public ministry began with a wedding feast at the behest of His Blessed Virgin Mother, so should it be capped in the same fashion. If there will be a great Restoration, how better to liken it to a marriage feast on Earth? This time it is Our Lady herself who provides the best wine of her joy and gratitude and everything she had stored up in her Immaculate Heart from the time He was born: to truly see Him crowned as the King of Kings to Whom all nations bow the knee at last but before the very end.