We are taught that Rachel chose to be buried in Bethlehem, rather than in Hebron with the other patriarchs and matriarchs. She foresaw that the Jewish people would pass by Bethlehem many centuries later when they were driven out of the Land of Israel following the destruction of the first Temple. At that time, after the patriarchs tried but failed to appease G‑d, Rachel argued that just as she had not been jealous of her sister Leah when she became Jacob’s wife, G‑d should not be “jealous” of the idols the Jews had worshipped. G‑d accepted her argument, and proclaimed: “Because of you, Rachel, I will return the Jewish people to their homeland.”
It is Rachel’s self-sacrifice and devotion that evoke G‑d’s promise to redeem us, despite our misdeeds and shortcomings.1


Did Rachel have a choice? If Leah was meant to be Yaakov Avinu's olam haba wife, would it have been possible to bury Rachel with him and the other patriarch/matriarch couples?
You guess it; I don't know the answer to your question. However, your comment lead me to a story by Rabbi Hillel Baron -The Man Who Sold His Place In Heaven. I don't find inside the story any trace which could fit as an answer to your inquiry. Interestingly enough to me was that my olam habah were salable. Could it be that Rachel had sold off her olam habah to Leah and as a result of that sale Rachel was liberated of sharing the olam haba with Jacob. Do you find this possible?