Desconhecido, mas 20.000 parece uma aposta segura
Pelo que sei, o número específico de midi-chlorians que Luke possui não foi declarado no atual cânon da Disney. Dito isto, algumas entrevistas com George Lucas podem lançar alguma luz limitada sobre o assunto.
De acordo com uma entrevista com George Lucas na Rolling Stone .
You got it. And when he finds out Luke is his son, his first impulse is to figure out a way of getting him to join him to kill the Emperor. That’s what Siths do! He tries it with anybody he thinks might be more powerful, which is what the Emperor was looking for in the first place: somebody who would be more powerful than he was and could help him rule the universe. But Obi-Wan screwed that up by cutting off his arms and legs and burning him up. From then on, he wasn’t as strong as the Emperor – he was like Darth Maul or Count Dooku. He wasn’t what he was supposed to become. But the son could become that.
E, talvez ainda mais claramente :
“Anakin, as Skywalker, as a human being, was going to be extremely powerful,” he says. “But he ended up losing his arms and a leg and became partly a robot. So a lot of his ability to use the Force, a lot of his powers, are curbed at this point, because, as a living form, there’s not that much of him left. So his ability to be twice as good as the Emperor disappeared, and now he’s maybe 20 percent less than the Emperor. So that isn’t what the Emperor had in mind. He wanted this really super guy, but that got derailed by Obi-Wan. So he finds that, with Luke, he can get a more primo version if he can turn Luke to the Dark Side.”
Isso claramente implica que Luke poderia se tornar o que Anakin deveria ser: um usuário da Força mais poderoso que Darth Maul, Conde Dooku ou Darth Sidious. Luke é simplesmente uma versão "mais primo" de Anakin, livre da perda de membros ou da robotização. Anakin com os níveis de midi-chlorian que ele tinha em sua juventude, em outras palavras.
Isso sugere que Lucas foi retratado como tendo o mesmo nível geral de poder (e talvez midi-chlorians) que Anakin: 20.000 :
Qui-Gon took a slow, deep breath and exhaled softly. “What do the readings say, Obi-Wan?”
“They say the midi-chlorian count is twenty thousand.”
The Phantom Menace
No entanto, uma importante ressalva se aplica: agora que a Disney é responsável por canon, nada disso pode se aplicar. Dito isso, parece que a Disney é geralmente tentando manter seu cânon em consonância com o que Lucas escreveu, então essas declarações pode ser visto como tendo alguma validade de cânone. Além disso, algumas das principais pessoas associadas ao novo cânon, como J.J. Abrams, sugeriram que não querem questionar os pronunciamentos de Lucas:
I will just say this: I would never presume to question anything George Lucas says is canon in Star Wars. And our job was not to negate or undo. A lot of people who are critics of our Star Trek, and I respect all of them, said we destroyed what they loved and negated everything. And we worked hard to clarify that we are not saying that our Star Trek over-rides a thing of the original Star Trek — it was a parallel timeline. I never wanted to negate canon that fans held so dear. And because I love Star Wars and have for too many years… … And having said all that and meaning it — I don’t want to presume over-write or change what George says the rules are.
Além disso, o que é canon mostrou Luke conseguiu alguns feitos bastante impressionantes, como aparentemente desviando uma explosão usando a Força ( Shattered Empire ):
E, claro, o fato de que Luke derrotou Vader em combate com o sabre de luz depois de ceder à sua raiva ainda é bastante canônico, nos dando alguma evidência de que ele é mais strong do que o nível de poder de Vader desde a trilogia original.