Well, this all began when Johnny supposedly wanted to make a movie using a script of Will's. The script included the fact that Marlena had been possessed.....so Johnny lept on just that, rewrote the script.....then talks family members into portraying other family members. This alone sounds like a dream or fantasy.
Pretty long dream, if it is one. I have seen speculation that it is Jennifer within her coma having this horrible fantasy dream, & that it is Johnny, imagining how his "movie" would play out. Whatever the reason for it all, it is a disservice to the viewers to drag such a horrid storyline out for so many months, especially during the holidays.