A thought I had at last night's seder.
The Haggada (from the Mishna in Berachot 12b) discusses whether we will still remember the Exodus from Egypt in the time of the Mashiach. The Maharsha on the Gemara there mentions that the we will no longer have a daily rememberance of Yetziat Mitzraim (according to Ben Zoma) or that it will be secondary to the final redemption (according to the Sages) because the miracles that take place at the time of the future redemption will eclipse those of Yetziat Mitzrayim.
I find this difficult because Yetziat Mitzrayim was supposed to be the final redemption. Had we not committed the chait haegel, when Moshe Rabbeinu descended the mountain with the luchot, we would have succeeded in restoring the damage caused by Adam's chait. We would have been unable to sin, and there would be no further need for a future redemption. Since the chait haegel had not happened yet, Yetziat Mitzrayim should have all of the miracles needed for the final redemption, and it doesn't make sense to me that the real final redemption should have larger miracles. Hashem pulled out all the stops the first time, why should it be bigger the next time.
Thus, it seems to me that the reason why our memory of the final redemption will eclipse our memory of Yetziat Mitzrayim because we will associate the final redemption with the knowledge that this time our teshuva was complete and the redemption would be permenant because of it.