We just learned that Montreal Ubisoft between 2010 and 2012 worked at Prince of Persia Redemption. It was a planned release for Playstation 3, Xbox 360, and PC but was eventually canceled.
The strangest thing is that the video has been posted since 2012 on an inactive channel but has recently been recovered in the ResetEra forums. They have started looking for connections and have found comments from Marc-Andre Belleau, a former Ubisoft worker, as well as another worker’s LinkedIn who mentions a game canceled between 2010 and 2011.
The truth is that it is a shame because it looks great and everything indicates that it was going to be a reboot of Las Arenas Olvidadas.