A free Resident Evil 6 update scheduled to release in mid-December will feature an adjustable camera system. You'll be able to tweak it to suit your tastes. In the gallery you'll find pairs of images that seem to show how the range of settings for the camera.
Beyond this, Ada Wong's campaign will be available without having to unlock it. A new "insanely hard" No Hope Left difficulty setting is also coming, giving you even more of a challenge beyond the existing hardest setting.