A LinkedIn profile of Sean Popejoy has revealed that Ubisoft might be preparing to announce a new Rainbow Six game soon.
According to his profile he developed Pro Tools sessions from Ubisoft audio for the game demo of Rainbow Six (2011).
Also, a quick WHOIS search reveals that Ubisoft owns a domain by the name of www.rainbowsix-BD.com, which suggests that this might very well be true.
We’ll send Ubisoft an email and check if they have anything to say.