User blog:Multiverseman/What I think the ending of Bioshock infinite will be

Booker Dewitt and Elizabeth escape Columbia, but because of their actions, they are exiled from the United States. On the boat towards Russia, Booker turns toward Elizabeth and says, "You know; you've never told me your last name."

Elizabeth turns back to him, and says, "It's Ryan. Elizabeth Ryan."

THE END

This is just speculation, but still.