return of the padawan...
it would be interesting, in a sith vs jedi sense, that luke decides to not pass on his knowledge, and to bury his sabre at the end of ROTJ. the reasoning behind this, is that perhaps withouth the jedi, there is no force use, and no dark side, so no sith, so the same events need happen again. the force could be brought to balance by its annulment.
in a gary kurtz interview, he mentioned how the original plan for episode I was to have the creation of the jedi order. perhaps if in a very radical edit this were to happen, the act of buring the sabre would have more poignancy.