More non-L primes coming
Expect to see a new EF 50 f/1.4 IS sometime in 2013. There have been variations of a replacement for the very old (1993) EF 50 f/1.4 and it sounds like a 1.4 IS variant is going to be the winner. We have also heard of an f/1.8 IS version existing. Don't expect such a lens to be much less than the $800 that the EF 24 f/2.8 IS, EF 28 f/2.8 IS and EF 35 f/2 IS all approximately cost.
The EF 85 f/1.8 is also in the works with an IS version we're told. I haven't heard anything about the very good EF 100 f/2 getting a replacement.