In the past two articles, I've gone extremely in depth into the contents of the episodes. I saw this as a good way to explain exactly how the game portrayed the movies. But since, at the time of this article, Revenge of the Sith has not been released yet -- such an in depth description might not be the best format.
As for movie spoilers... I would love to go into those and explain just how everything happens, but like the previous episodes -- Revenge of the Sith seems to skip over what should be critical parts of the story. Most of the secrets that will be revealed in the movie are not even mentioned in the game. Questions like: What finally pushes Anakin into the dark side? Who is Darth Sidious (if you haven't figured that out already, that is)? And how do so many Jedi die? are still left in the air. I don't know if these were taken out because the developers of Lego Star Wars: The Video Game weren't informed, or if these were the parts of the story that were deemed too dark for the desired audience.
Either way, this episode (like the other two) seems to touch on the major battles and story points in order to get the overall tail told -- but leaves the details out and makes you want to see the movie that much more.