When I first saw the images online, I was amazed that another Vader had been selected to be the next Sliver Figure. For a line that caters mainly to collectors, and consisting of only 6 figures total, why would Hasbro decide to repeat a character that started us off?
I asked this question to the Hasbro guys while visiting Comic Con and their answer made so much sense to me. They simply stated that since this next (and final) figure is a store exclusive (TRU) they really had no say in the selection. As it was explained to me, TRU gets to choose the figure for their promotional give-away, not the Hasbro team. This is exactly what happened with the Clone Trooper.
Anyways, I'm sure that a few of you out there had the same concern...2 Silver Vaders??? Well, this is your answer from Hasbro.