Monster Hunter definitely. I've been with this franchise since PSP and I was biting my fingernails on it's success. I honestly think no one (Roterfan being the exception) expected this kind of success it gained. This game most likely even shocked Capcom themselves. And the crow eating on this game was significant. People thought Freedom Unite was untouchable but here we are.
God of War was obviously going to be crazy successful. I expected really good sells.
Dragon Ball FighterZ was in between for me. After the first trailer and the hype of the franchise coming back to life with Super, the success of this game was predictable however it not being arena based like Tenkaichi was making doubt its success among casual fans.