Mirrorless sales are tanking in the US and Europe, but doing great in Asia. Canon is undecided about sinking a ton of $$ into new models to sell in the US/Europe.
I suspect that they will offer a high end model that appeals to enthusiasts, but are waiting for better financial times. Canon is very conservative and it has paid off for them, while others are losing money, they are still profitable. When the time is right to sell one for a profit, it will appear.
I saw a lot of Japanese tourists when I was on holiday in Turkey last year. Many of them carried a Sony NEX, and of course there were DSLR's too. I can't recall there being many EOS-M's though.
5D3, 5D2, Sony α6000, G16 | SY14 f/2.8, Ʃ20 f/1.8, 24 f/2.8, 35 f/2, Ʃ35 f/1.4A, 50 f/1.8 I, Ʃ50 f/1.4 EX, 100L Macro, 17-40L, 24-105L, 70-200 f/2.8L IS II, 1.4x II, 70-300L, 100-400L | E-mount: SY12 f/2, Ʃ19 & 30 f/2.8 EX DN, 16-70 ZA OSS, 55-210 OSS, Metabones SB | FT-QL, AE-1P | FD(n) & FL lenses