If Obi-Wan Kenobi doesn't fight Vader again, then it breaks George Lucas line from A New 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 an 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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