Incredible but true, a video of a canceled Prince of Persia project had remained hidden during 8 years in the vastness of Youtube.
The project was supposedly titled Prince of Persia Redemption and appears to be another Prince of Persia reboot. This footage is now popular, but two years ago, Marc-Andre Belleau (Assistant Technical Director at Ubisoft) was notoriously surprised that it was leaked and made public.
Furthermore, if we take a look at the Linkedin profile of a 3D artist who worked at Ubisoft in the past, we can also see that the Prince of Persia Redemption project was real for a while.
Take a look: