...ause we the audience knows does not mean it should be the means to an end in the movies. Just because we know why Jason is what ge is does not mean his foes, enemies or protagonists should for some bullshit reason stumble upon this mystery or figure it out however. It should, especially in Jason's case remain a mystery, mythology and legend within the movies. With any type of reveal I feel that is the only way to maintain integrity in the series and character. With Freddy and Michael I find this scenario a little different, though you are correct it enabled them to for some reason kill their own franchises lol. I must say that both Halloween and A Nightmare on Elm St both screwed up there main character and storylines much less despite Friday the 13th series having far more potential.