Gee, there's a pattern. First, there's a major disaster that kills many people. A "psychic" sees it happen before it happens and his/her freakout saves several people. The survivors then start dying in extremely unlikely but rather gruesome fashions (because Death is a sadist at heart, apparently). Psychic and friends figure out that there's a list/order, and that they have to figure it out and "save" one another, forcing Death to skip them once again. Then they figure out that Death loops around on the list and starts again, over and over until it finally gets them. By the time they get to this point, there's only two or three survivors left.
When the first FD movie did this, it was unique despite the mythology being rather silly. The second FD played on the first movie, suggesting a way out of the endless Death loop, and, in my opinion, it worked better than expected. Then the third and fourth movies came along. Instead of adding to the mythology, or even honoring them, they acknowledge the previous movies with a throwaway line essentially saying that, "Yes, this has been done before, but we're going to act like it hasn't." Our characters are too stupid to look things up on the Internet or something, so they never figure out the second movie's "new life" escape clause (though there's some indication that said clause didn't actually work, if you go by another throwaway scene on the DVD of FD3).
The fourth movie was so bad about this that not only did it ignore the previous movies, it wraps up the whole franchise (or was going to, before it made money) by suggesting that ALL OF IT was Death's plan, and everyone was doomed from the start. I HATE that. It turns what was decent suspense and horror into "Let's watch people die." It's ghoulish. While it sounds like FD5 is trying to shake up the mythology (they have to, considering how FD4 ended), this doesn't redeem a series that has become the modern equivalent of Roman gladitorial combat - gruesome violence for the sake of gruesome violence.
Final thought: Interesting how everyone's talking about the trailer to Darkest Hour and not FD5. Tells you something right there.