It is understood that since the text of Arami Oved Avi includes in it much of the story of Yetzias Mitzrayim, it is very pertinent to the Seder. However, why was this passage, which is part of the mitzvah of Mikra Bikkurim, chosen over so many other Torah passages that narrate Yeztias Mitzrayim? Is there a relationship between Pesach and Mikra Bikkurim?
Bikkurim is unique, for no other action-mitzvah requires one to narrate portions of Jewish history upon its performance. Why does the mitzvah of Bikkurim mandate the recital of such a text?
Bikkurim are - in many ways - symbolic of the origins of the Jewish People. The fruit began as a small seed with no vitality or import. Upon personal attention and effort on the part of the farmer and his careful cultivation, the seed grew into a fruit-bearing tree, which ripened and merited to be part of God's service in a most significant manner. So, too, were the Jews at the time of Yaakov Avinu powerless and minute. Hashem took our nation under His wings, developed us into a large, thriving religious movement, and brought us to His land. Thus, Mikra Bikkurim is not only an historical text. Rather, it links the Bikkurim to the Jew by demonstrating the symbolism and meaning of the fruit and Jewish destiny.
The Talmud explains the great pageantry associated with bringing Bikkurim. Pilgrims bearing Bikkurim would be accompanied by musicians on their trek to Yerushalayim; the animals which were loaded with Bikkurim were adorned most lavishly; the baskets holding Bikkurim were ornately decorated and beautiful. Although these enhancements are precipitated by the requirement of "Hiddur Mitzvah" - beautifying mitzvos - they are presented by the Talmud primarily in the context of Bikkurim.
One can draw a connection between the gala march and delivery of Bikkurim and the Jew. When Hashem brought our people through the desert and into the Land, He did so with a full display of splendor and grandeur. We were enveloped by Ananei Ha-Kavod (Clouds of Glory), led by God's pillars of fire and clouds, protected from all elements in a most miraculous way, and delivered into a bounteous plain, marked by the splitting of the Jordan River and the passage of the Ark and the nation on dry land. The sheer glory of our journey was therefore akin to the radiant procession of Bikkurim, and the splendor of delivery of Bikkurim is thus a reflection of the Jews' travels upon being redeemed by God.
Bikkurim symbolize and beautifully illustrate our people's birth and development as a nation and our redemption from Mitzrayim; it is for this reason that Mikra Bikkurim was selected as the ideal text of the Seder night.