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It seems that these screens and documents were taken from an early concept of the project, some of which are from a set of “fantasy themed” levels (probably for bonus missions or multiplayer modes).
Development of this Red Steel 2 prototype was stopped in October 2007 when Ubisoft raised concerns about the game’s quality. Since then, Ubisoft Paris started from scratch and a “new” Red Steel 2 is planned for a release in 2009. Ubisoft Montreuil went on with making Rayman Raving Rabbits 2 and TV Party.
Here's the post and artwork on Unseen64...