Ok say you have the ability to swap any one chatacter from all eras and titles of Star Wars and role reverse them, who would you choose??? And how would their background change? so if they were Sith, now Jedi. Rebel is now Imperial etc.
For example I would have liked to have seen Tarkin as a Rebel. He was an up and comer in early Imperial days. The hated Jedi were wiped out however with open war still spreading across the galaxy, there was still alot to clean up. Tarkin becomes disillusioned with Imperial mandate when the body count increases and how little the Emperor cares.
Tarkin betrays/ leaves his post just before ANH when he finds out Darth Vader sent Tarkins son's squad on a suicide mission to capture a netural world's capital. With no remorse from either Vader or Palpatine, Tarkin sees the rebellion as a way for them to pay.
Tarkin been hard and driven and of military training would give the Rebellion a harder edge.
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* I know this happens in a way to Vaders LAst Command *
I hunt down Smurfs for sport....