Yes that's it. I'm cool with Luffy inheriting the will of the D clan, but if he or his fruit result in being Joyboy reincarnated, that will ruin everything for me. It always felt like Luffy had some wacky paramecia that he mastered using his own genius ability. Now we have a prophecy claiming Luffy will be the one to defeat Kaido after 20 years, and he might be Joyboy on top of that. I can't stand borderline predetermined events in a story.