The M3 could be interesting for me, depends on the specs. Possibly the 11-24/4 at some point, too.
To me, M3 needs decent AF speed, EVF and of course few more native small primes.
The MOST important factor for Canon to gain ground in mirrorless world is EF adapter to mirrorless. If they can come up with adapter with decent AF speed, better than current ones on the market, I think that will give Sony, Fuji etc... good run.
You want primes, the next poster wants an 18-200, presumably native, and I'd like a tiny native 15-85. Which do you think is going to come first? I'm not sure but my guess is the primes come last. In the age of extremely high quality zooms, prime lenses are so esoteric that they are positively elitist.
I agree that an EF-to-M adaptor plus a speed booster are essential. Otherwise, Canon can't leverage their large lens lineups and, if MILCs replace DSLRs in the next 5 years or so, Canon will find themselves years behind Sony, Fuji, Panasonic, Olympus and Samsung. Canon can't afford to take that risk.