Monolith’s Tetsuya Takahashi revealed to EDGE Magazine that Xenoblade Chronicles X’s map is five times bigger than the map in the original Xenoblade on the Wii.
“Vehicles are called Dolls. They are 5 Times larger than a person. So to get the same feel as Xenoblade Chronicles, the map would need to be 5 times bigger. The game world in X is in fact even bigger than that.”
Xenoblade Chronicles X releases for the Wii U in 2015.