In the event of a lockout for the 2011-2012 NBA season, veteran players might find themselves playing overseas. For some veteran players, this might me more likely to happen than others.
Players without a contract after this season will become free agents free to sign wherever they please all over the world. Players with contracts present a different issue. According to FIBA rules, players need to be granted a special exception by FIBA to play for any FIBA team while under contract. Also, in order for this to happen, their current NBA contract needs to be officially invalid for that year. Politics will play a big role in solving these issues.
Besides contract rules, other factors will influence this migration. Perennial all-star players will not likely play overseas for a significantly reduced salary and risk injuries. Seasoned veterans will likely have to deal with family constraints as well.
Taking all the above into account, here are the top players that will probably go play overseas if a lockout was to happen.