According to IMDb, Eutamnesia is a real movie. Yes, the resemblances are striking, but from first hand experience : I was writing a comic book before The Invisibles came out in 1994 that hit almost all the same plot points, this proves nothing. I know for a fact Grant did not steal my ideas, but they were very similar nonetheless. (Of course, Grant did a much better job than I would have.) I doubt Duncan would need to steal for his art, especially given his upbringing and background.
These types of similarities happen often and influence each other regardless of contact. One does not need to see a picture to present something similar anew only to find it was already done. Quantum theory covers this nicely. Once something is observed (or thought) it becomes easier for someone else to reach the same conclusion.
This is not to say NO! HE DID NOT STEAL THIS IDEA! This is to say simultaneous ideas happen more often than most people realize. Given the amount of time it takes to write a screenplay, shop it, sell it, get a budget in place, hire the cast and crew, have rehearsals, do a read-through, do location scouting if it's not all done in studio, production, post-production, etc, why would David Bowie's son try to cheat his way into the system when he was already trying to hide his pedigree and make his own way? He could have coasted through many barriers without talent just riding his father's name.