a recall would be disasterous to Canon!
a recall would mean:
a) Canon would spend money on replacing and fixing the bodies
b) potential customers would think three times about purchasing it
c) admitting there is an issue, weakening their stance once lawsuits start being thrown around
the current issue with the bodies will be taken to court and there WILL be a lawsuit - but at this time, the collection of data is what is happening... a lawsuit is in the works, and Canon is now walking on eggs...
a recall would be suicide for Canon (but again, remember, you the customer are not that too important) - you should be ok in using the camera as it is! 
What? No body will sue Canon. As I read from other posters (and 5DM3 owners I presume) that this is not an issue at all. What if little light leaked into a 'camera'? I bet early pinhole box cameras had some light leaks also
. You guys just want everything 100% perfect? Just go out and shoot and don't forget not to turn on the LCD at night and you might also need to be carefull when direct sunlight hits the LCD while photographing subjects in the shadow.
Why don't we just put a black tape on the LCD and button, just to be in the safe side. CANON, don't bother with fixing this, you've got the nicest customer base ever. (sorry for the sarcastic post)
If it is not an issue at all, fine for Canon, but I am sure they have to fix it. To much is public now and in the most europeen countrys we have this customer protection, 2 years warranty and refund by dealer and company.
I think Canon will do a recall or a fix by firmware. That‘s normally not a to big deal for them. Better to fix it,
better reputation. S____ happens ;-).
But most buyers and owners are so angry and looking for a faulty camera, is the price they paid for. 3299,00€ for an update is something. No question the EOS 5D Mark III is a great camera, with an superherb AF- System, but for so much money they expected a flawlessly camera.
I am sure Canon didn‘t expect that Nikon come up with 36MP in an D800 :-)fo 2899,00€, but that's good for us Canon 5D MarkIII Buyers. That's put a bit more pressure to Canon to fix the Camera.
Have a nice Weekend