Absolutely, there are two lens I are patiently waiting for.
1) 50mm f/1.4 IS II or 50mm f/1.0
2)100-400mm f/4-5.6 IS II
The portrait in room such as my baby photo, model sharply shooting is necessary of the first one. And my travel for wild in Kenya, it would be the second one.
I don't know why Canon dosen't product the 24-70mm with IS function. As a tourist, it is important for me that it shoud be a little convenience to carry my device.