Personally, I think the trailer's amazing. It's probably the best trailer I've seen for any Star Wars film. When (spoilers) Palpatine said, "Are you threatening me, Master Jedi?" and whips out his lightsaber, I got chills. Did anyone else notice that Ewan McGregegor sounds different in this one? His voice is softer and more drawn out. I think he may trying to bridge the gap between his performance as young Obi-Wan and Alec Guiness in the originals. I so cannot wait for this, and the fact that the Chronicles of Narnia teaser will be attached to it is icing on the cake.
Where or when did I hear than Lucas was thinking on release the episodes VII,VIII and IX than are based on the books about the story of how Luke continues the Jedi order training the childrens of Han and Leia--remember she got the force too--
Yes, Episode 3 will have its tear-jearky moments, its the nature of this story. You saw Padme in the trailer, watching Anakin's fall to the Dark Side will be gut wrenching for her. BUT... yes, its gonna have loads of action and lightsaber fights, don't worry about that. You're better of not hanging onto every interview or off hand comment that you hear about the film. Just wait for the big day (less than 2 months now) and have fun!