http://www.vg247.com/2014/11/25/zombie-u-2-listed-on-amazon-france/
A listing for Zombie U 2 has been spotted on Amazon.fr. The listing has since been removed, but not before Jeuxvideo grabbed a couple of screens.
Interestingly, rather than a vague December 2015 date, the listing pointed towards a specific day: October 17, 2015. The listing also mentioned Bandai Namco as a publisher, which is very strange since the game was developed and published by Ubisoft.