Adieu Galaxy Express under Suspicion

The animated movie Adieu Galaxy Express was released one year after the release of Star Wars Episode V. The animation film is based on the comic strip of the same name by Leiji Matsumoto. I watched both of them at theaters in those days but I was really disappointed when I knew that the relationship between the main character, Tetsuro Hosino, and his formidable rival, Faust, equals the one between Luke and Darth Vader. I then even suspected that the Adieu Galaxy Express staff plagiarized the idea in Episode V and I lost my interest in the animated movie and the TV cartoons based on the manga by Leiji Matsumoto, such as Space Battleship Yamato. 

Now, I doubt that they could change the script and story of the cartoon movie only for one year. However, although it might have been by chance, yet I was so young that I felt betrayed at that time.