It would be insanely awesome if national teams and tournaments were included in the next version, complete with official uniforms. I fear there may be licensing issues of some sort associated with this, but hell it would be the coolest shit since sliced bread. The international players should also be in the free agent pool so that they can be signed during the Dynasty mode.
To add to this, there should be tournaments (true-to-life ones if possible) during dynasty mode, or as a normal game mode along with season, playoffs, etc.