Looks like they will also preview the 2013 programs and perhaps new 2013 qualification requirements.

Our 2013 program

By the end of December 2011, we’ll be announcing details about the 2013 Air Canada Top Tier Program, including:

Some key program changes
Qualification criteria for each tier level
Overview of the benefits
Keep an eye out for an e-mail from Air Canada, visit aircanada.com/toptier2013, or follow us on Twitter @ACTopTier