All the speculation and combing through old episodes is fun, yes, but the only thing that would worry me is if it's over-hyped and then under-delivers.
Face it, a good movie is one that you can watch over and over even knowing a big reveal (like The Empire Strikes Back). A big shock revelation is fun once, but if that's all a film has, then it won't stand the test of time. I'm hoping Abrams is holding stuff for a big reveal that won't be that entertaining when it's watched for the dozenth time.