"Why? His identity was a secret during ANH." Let me try to explain more clearly where I am coming from. My understanding is that GL began to write what became ANH nearly 30 years ago. Things changed very drastically during many re- writes. Eventually, characters, plotlines, etc. became what we know today as ANH. As part of the process or writing the story for ANH, GL developed an outline for a back story. The primary reason was so that he would know who all these characters were, and where they came from. My guess is that this outline basically states how Obi-Wan came to meet and train Anakin. How things went wrong that ended up pushing Anakin to the darkside, and how Anakin came to be Darth Vader...requiring a life support suit for survival. I highly doubt that this outline is detailed enough to cover exactly how all of this will be presented to the audience. For GL to go strictly by his original outlines, I would have to think that the story would be very straightforward, and only filled with facts...among those being the fact that Anakin is Vader. GL spent a lot of time writing the script for Ep2 (and will likely do the same for Ep3). The point of this is to finalize all the details and determine exactly how this will be presented on film. As part of my contentions, I believe that GL had already decided that Vader would be Luke's father by the time the final scrip for ANH was completed and filming began. I once thought otherwise, but I was proven to be wrong in another thread...very good sources were included that showed that GL knew who Vader really was all along(I would love to find this thread again). The reason that Vader's identity was not dealt with in ANH is pretty simple. GL didn't know if SW would be successful, so he wanted to make a stand alone movie. He figured that the audience could actually be turned off to SW if things were not wrapped up nicely in one film (sequels were not the norm in 1977). So, when watching ANH, with no other knowledge of SW, it does seem that Vader's identity is a secret. However, IMO, this does NOT mean that this truth cannot be revealed at an earlier time (such as Ep3). I think about it like 6 chapters of a novel. Should every relationship be clearly spelled out in every single chapter? Just because something is NOT mentioned in chapter 4, does this mean that it cannot have been mentioned in chapter 3? Besides, where in the context of ANH, could it be mentioned to the audience that Vader is really Anakin Skywalker? In this film alone, there is no time to tell the audience this, but it does NOT mean that the audience cannot be told this sometime earlier. I believe it will be very interesting to see how GL handles all of this.