Divergent/ Hunger Games: Theories and Plot Twists

Hi! This is my first book and I am a HUGE fangirl for these series and proud.
Disclaimer- I did not come up with any of the theories in this book. I just knew there were so many and it most of them blew my mind; so why not find all of them? (Obviously not all of them are here, no one has that much free time)
(SPOILER ALERT, YOU HAVE BEEN WARNED!)
Enjoy!