From here
The following details come an Unseen64 team member...
- ZombiU 2 was in development for a short period back in early 2013
- roughly 5-10 staffers worked on the project
- the game never left pre-production
- it didn't take long for the game to be cancelled
- explore a “run-down, zombie apocalypse setting”
- would have featured co-op
- one player would control the GamePad, while the other would use the Pro Controller
- players would get split up via multiple routes at points during the campaign
- this co-op would be local only
- more melee weapons were another desire of the team