November 2018
PVZ 2 Zombie's mode.
It would be cool to see an adventure mode, where you're the zombie instead of plants, and you face AI, to unlock different types of zombies, then you could use them in a 2 player online multiplayer mode where one person plays as plants and the other as zombies, where the plants currency would be sun falling from the sky, and the zombies would be brains rising from the ground.
November 2018
sounds intriguing