Like anything else, if the components are making money, you probably won't see them disappear.
All this means is that the creditors will get pennies on the dollar, the common share holders will get completely screwed and the company comes out smelling like a rose.
It may be the end of the Aspers however, since their shares will be worthless as well and the only reason Lenny was in there in the first place was good old fashioned Canadian Nepotism (Magna, Bombardier, take your pick). Now that their holdings have theoretically been wiped out, I'd be amazed if they kept their jobs. (You never know though, they're probably pretty crafty.) Bear in mind that they will still have their own personal fortune which no-one can touch. (Ask Reichmanns about that little trick

)
The problem is, based on news stories I have read, is that not only are they crushed under a big debt load, but in fact many of the pieces are not making any operating profits. The newspapers are generally in trouble, and much of the broadcast network is at best a break even business. Just as importantly, each of those channels I listed before is still facing the "switch to HD" in 2011, so every one of them is going to have to borrow and reinvest in studio equipment, editing equipment, and in the case of the broadcast TV channels, to all move to HD transmitters.
I really think that this is what is going to happen - and this is my own opinion, not based on any hard facts or insider knowledge, just my take:
1) The newspapers will get broken off and sold cheap. The National Post will likely cease, as it has been proven there is not enough of an ad market to support it.
2) The Global network will be broken off by itself, either retain or sold.
3) The cable properties will be sold or partnerships ended. There is potential that some of them may not make it back. However, the cable properties are often the most profitable, due to carriage regulations to the cable and sat companies, and the rates they have to pay to the channels to carry them.
4) The Canwest production group will likely be sold to third parties or closed out altogether.
The result? Canwest Global will likely end up as the Global network and maybe a small minority interest in the cable properties. Production of Canwest productions will be outsourced, with CWG agreeing to certain contracting terms to buy those shows for their channels.
The fear? Having companies like Bell, CTVglobemedia, or Astral ending up owning MORE of the cable channels. Already ownership is limited, and bringing it in even further would truly suck.