AP would be nice, though I am slipping into a "basic is best" mood lately and I can live without that. Adding this and the exposure comp would probably mean loosing the mechanical shutter, which although that is not a big deal, I would prefer to keep the ability to shoot at all shutter speeds with no meter if my batteries die.
Along that line, I would hope for a longer baseline rangefinder for more accurate focusing. That would require a newly designed body though, something that Cosina has not done yet. Keep the M mount. How about improved meter with TTL flash and continued refinement of the product, closing the quality gap a little for those who are concerned with that. I actually like the manually chosen frame lines as opposed to the automatic ones on the Leica. Better to have choices and risk user error in my opinion.
In the end, Leica may be right when it comes to rangefinder cameras, basic is best. Up until the M7, every M body is basically as piece of simple beauty. Take out the meters in the M6 models and you have an M4. Just change the frame line options if you want an M3 or M2. They just keep it simple, and charge a premium for it. Of course, they offer simply perfect quality too. And, well, to make up for the sin of the modern M7, they introduced the MP to get things back to what, the basics.
I read on the CVUG, or Rangefinder list speculation too that Konica-Minolta may introduce a new rangefinder in October. Hmmm, a new Hexar, or CLE? Either way that camera, if it is real, surely will have all the bells and whistles you could hope for.