With X and Y now officially announced, many people have been guessing: What comes next? One of the most likely possibilities is Pokémon Z. 

  1. X, Y and Z are the 3 axes of the 3D world. Since this is the first main Pokémon game for the Wii U, this could make sense.
  2. Here is a picture to explain:
  3. The myth of Zyggdrasil. Read about it here. You will notice the similarities: Yveltal is the eagle, Xerneas is the four deer, and the Z legend is the dragon.