I sure hope so.... Would only make sense that we would get differing versions of certain people because the game does have a time line on the missions. So if you had a mission beyond a current timeline, allies for that mission should be reflective of that differing time.
New campaign guide
I think it's a given we will see a Jedi Luke later on. The use of time frames for campaigns and unique characters titles strongly suggests this.
Lets just hope the new movies turn out to be great and we can look forward to new campaigns set in those times.