"I will fulfil OUR destiny" - Luke gone to the darkside
I hate the idea. The Emperor and Vader couldn't turn Luke. He watched his friends dying and chose death, I can't see how he'd then change in the future.The complete lack of Luke on the posters and in the trailers has me suspecting this. And I LIKE the idea.
That's not what happened. He was lying on the floor being electrocuted, saying 'father, pleeeease'. That's not completing a journey to the dark side.After all, there is a way of interpreting the end fight scene of RotJ to suggest he did indeed give in to his anger and complete his journey to the dark side.