I would expect Canon to add WiFi and a touchscreen to the next xxxD or xxxxD camera, and the video AF should show up as well, although doubtful about the DPAF from the 70D - that looks like something that the marketing department would consider worth a price premium. However, the M mount is specifically designed for mirrorless, rendering a mirror and optical viewfinder physically impossible and necessitating an EVF, so I doubt that Canon will go that route. Since they don't have an M model with a form factor similar to the Panasonic G-series, I wouldn't be surprised if Canon goes that route; however, that would not qualify as a DSLR as described by the rumor.
Well, putting the MP count lower could pave way for DPAF on the sensor, if Canon wants to go over to only DPAF sensor systems. other variants would ofc be the 18MP without anything else (yes, that one).
Anyway, it is the flange distance/placement of mirror in between mount and sensor that is smaller, right? I guess for it to be DSLR, M is out.
And, I agree that Canon will probably do a M-Mount, EVF version of the SL1, (MSL1? SLM?). I think such a move together with 2 additional M-lenses would start the M line sales up significantly, especially since I think that combo would sell great in the US. OM-D equivalent from Canon.
(Just PLEASE make the EVF state of the art!)