The man's goals were apparently clear - sell the data en-masse, though it is unknown if he was actually part of the theft. Obviously, TJX and U.S. authorities will want the man brought to the U.S. for trial, though that may not happen.
This case is interesting not only due to the technical nature of how they data was supposedly stolen (access gained through unprotected wireless networks) but of the sheer volume. Mass amounts of centralized, sensitive data proves to be a lucrative and tempting target for thieves. Maybe massive databases aren't such a fantastic idea.