I'm pretty sure the bus is like the minecart of Shangri-La.. Because when the bus stopped, there was a mystery box place holder, you know the teddy bear on some black boxes.. Hence the level is playable, the bus is used for escape routes or to move across the map, something like that.. Plus the blue eyes of zombies, shows its a continuation from moon ^_^
“The bus” is a brand new attribute to the epic experience which is Nazi Zombies. The bus is driven around by a robotic driver in a set course. The player can ride around the bus throughout the never-before-seen mega-map, “Tranzit”. The team can pay in-game points to make certain upgrades to this bus which include things such as speed, armor, and other “perks”.
“The bus” is a brand new attribute to the epic experience which is Nazi Zombies. The bus is driven around by a robotic driver in a set course. The player can ride around the bus throughout the never-before-seen mega-map, “Tranzit”. The team can pay in-game points to make certain upgrades to this bus which include things such as speed, armor, and other “perks”.