Looks like 2012 will be a very busy year for Canon...
EOS 1D X
EOS 5D Mark III
EOS 7D Mark II
I don't see this will happen!
1Dx is already certain.
650D is also pretty much certain since they announce a new Rebel every year. This is the most important segment to keep "fresh" to attract first time DSLR buyers.
Lots of 5DIII rumors lately, it's also long overdue.
And finally, what is better than a 7DII for Canon to steal the show at Photokina? 7D will be 3 yo by then.
Canon likes busy years, since they released 3 or 4 cameras before, all in the same year:
3 cameras in 2007 (40D, 1DIII and 1DsIII)
4 cameras in 2008 (1000D, 450D, 50D and 5DII)
3 cameras in 2009 (500D, 7D and 1DIV)
2010 and 2011 were rather quiet with only
2 cameras each year. So I think we deserve a satisfying new year