The episode plays out less like a Robot Chicken episode and more along the lines of a parody movie with a linear plot that takes time to make jokes as often as possible. The story is presented from the perspective of the villains. Particularly Emperor Palpatine, Darth Vader, Boba Fett and curiously a random Stormtrooper named Gary. Much of Vader’s story is from his days as Anakin Skywalker following him from being a child into adulthood.
I'm actually really glad this was explained cause the ads mostly focus on Vader not Anakin so I was wondering how much Zac we'd get even. It makes sense though to use Vader in ads since he is image of Star Wars really.
From Inside TV - EW
[Seth Green] on mining the prequels for humor:
There’s so much important storytelling there. With all that character development, that’s where our comedy comes from. Like for that scene in our new special [which parodies Padme’s rejection of Anakin in a romantic candlelit room from Attack of the Clones by showing her stripping for him], we took Anakin’s dialogue exactly from that scene in the movie. Watch that scene. That’s exactly his dialogue. And we were like, what is she doing? It’s unfair, I’ve got to say. I think she’s leading him on.
So with Zac Efron on the special, does that mean we get to hear Anakin sing?
Seth: Nope. Anakin doesn't sing. But we did take advantage of Seth MacFarlane's vocal stylings though. He's the Emperor.
Which guest stars can fans look forward to in this special?
Matt: Zac Efron is playing Anakin Skywalker which is pretty awesome. He's one of those guys you want to hate but end up loving him more when you meet him. He's too talented and good looking. We have man-crushes on him!
SJ: Is High School Musical’s Zac Efron the best voice for Anakin?
MS: I can’t lie. He’s one of those people who is way more talented than someone ever needs to be. He came in and did some stuff for us in our last season and just was unbelievable. We knew if we were going to bring him back, he needed to do something even better. Yeah, his Anakin is spectacular.
TV Guide Magazine: Talk about getting Zac Efron to do the voice of Anakin.
Green: I love that guy, that's what it comes down to. [Laughs] It's true! Matt and I have a crush on Zac Efron! I met him on the set of 17 Again and thought he was so nice and professional and really smart. Later I ran into him at some events and he said he really liked Robot Chicken, so we brought him on as Billy Joel and he sang for us and was just brilliant and very funny and so sharp — exactly what Johnny Depp and Brad Pitt were like at his age. He has exactly that same potential in this business to be that kind of star. And he's really kind and humble and so handsome, know what I mean? He was perfect for Anakin.