I think doing a version similar to Champions Complete would be superb. I have many friends who would want to pick up the game, and would be likely to purchase that sort of text to open the doors. If they have to buy the Champions Complete first, and then a Fantasy text, I know the $ and set-up would be a deterrent.
Of course, I do see the point made above, that a rehash of material for someone who just purchased CComplete would be annoying for said buyer. However, I feel that having only the one tome to drag around is a plus.