I've heard that Canon will be introducing a lot of new lenses this year. Quite possibly a record amount of new lenses announced in a single calendar year. For the moment, it's unknown whether the lens count will include any mirrorless camera lenses, or if we're talking EF lenses.
I will say, Canon may be updating lenses to help resolve a coming huge megapixel camera. We've heard previously a lot of short focal length lenses are on the update schedule, and we just saw 2 primes and a zoom announced.
Keep watching patents for clues. The EF 24 f/2.8 seemed like an odd duck, yet here it is. I almost expect an EF 50 f/1.2L II, no IS on that one though.
Lots of speculation about the end of the month for a new camera body. However, there is nothing concrete and I've been told that things are going “back and forth” in regards to an announcement.
I will say I have heard there will be a very high megapixel camera some time in 2012, possibly in the 40mp range and it won't be the “5D Mark III”.
The next announcement should be for an EOS body or two.