If Obi-Wan Kenobi doesn't fight Vader again, then it breaks George Lucas line from AnNew Hope where Vader tells Kenobi, "When I left you I was but the learner, now I am the master."
This last fight, Vader clearly won. So Vader and Kenobi will have to fight again, and Vader will have to lose. Maybe he leaves Kenobi via a Imperial shuttle firing upon Kenobi as Vader is battle damaged.
Either way, I hope we get another fight, and this time it's super intense!
Also hope we get Anakin Skywalker / Hayden Christensen Clone Wars flashbacks.
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