We have the EF 40mm f/2.8 STM pancake, can we expect something around the 22mm focal length seeing as canon have got one for their EF-M camera?

I like the look of the EF 40mm, but it's just too long for my use, I'd love something a bit wider and equally as dinky for the front of my 60D...

Alternatively, will the EF-M fit on a EF-S camera? Or are the distances all wrong?