The LinkedIn profile of a CG artist going by name of Shannon Justison has listed "Resident Evil 6 Cinematics" as being one of the projects she has worked on.
According to her profile, it appears she had begun working on the project on June 2009 and it's still under way. This suggests that the title must have been in development for a long time.
Shannon Justison works for a L.A. based film company known as The Third Floor Inc. and has worked on recent movies, including Thor and The Smurfs.
The Third Floor is a partner of Reuben Langdon’s Just Cause Productions, which previously produced the cutscenes of Resident Evil 5 for Capcom.
If something is announced by Capcom during GamesCom, we'll be there to cover it live.
Thanks, The Silent Chief.