The Apocalypse? and Generic Book Ending Predictions

So, this book is ridiculous. I won't spoil anything major but the main character just became almost invulnerable and there is about to be a huge battle pitting 40 campers vs. wave after wave of monsters and evil demigods lead by Kronos the titan of time. Also everyone in New York is asleep. Yeah thats insane. So I predict that they will win. My reasoning is that in a book like this they wont kill off the main character. But also in a book like this you know the author isn't just going to make them win and thats the end. There will be some plot twist such as his best friend is evil or someone dies or the classic hero almost dies but by pure chance he barely lives with almost no wounds. It's kind of predictable and I just made the book sound really boring but believe me it is really good. Also if they made the character die that would just be horrible and I would leave feeling depressed. Nobody wants that so I predict there will be a plot twist, the hero will win, and I will be happy. Peace Out.