There were rumors that Canon was interested in Pentax, if I remember correctly. However, that rumor seems pretty dead now.
With Canon suddenly getting "religion" about overly high pixel counts, Acquiiring a MF company still makes sense to me, but Canon seems locked in to propriatary lenses and mounts, and has the talent and knowledge to develop and manufacture their own. They also have a distribution network that is second to none, and can get product into pro shops anywhere in the world.
Right now, it looks like they have decided to move into the Cinema business in a big way. There must be more money in it than I had thought.
MF would be interesting, and a rangefinder would be interesting... I really liked on the G1X that the exposure compensation is an actual dial. I would love a camera whose controls all had some dial or at least button. A rangefinder with a manual shutter selector, aperture selector, iso selector, whitebalance selector would be wonderful!
As far as Canon's new religion of low megapixels, I hope they repent of it soon and return to the good old ways! Or, at least, they don't mess up the 7D mark II...