[eluser]BrianDHall[/eluser]
As far as I am aware there is no public information about CI 2.0, because CI 2.0 hasn't been announced as even being made as a unique codebase. Its just a version number that will be reached at some point, so everyone makes random guesses as to what the future may hold.
EllisLabs has made no announcements on dropping backwards compatibility and most likely won't, ORM is considered something that should be handled by an extension (and I don't see how they could do much more than just include DMZ by default, as making something better would be tough to manage), etc.
But indeed, no one really knows what the future holds. And if TV, newspapers, and the radio are any indication, that doesn't stop anyone from pretending