My MkII won't be discontinued for the foreseeable future, thanks in part to my 7D I love the way the MkII and 7D complement each other. In my eye, a choice can be made between either the both of these camera's vs 'only' the 5D mkIII that combines their functionality. I strongly prefer to have two bodies however with different capabilities - always the right tool for the job and the possibility to carry both bodies with different lenses for different focal lengths to save swapping out lenses.
I also have the 7D-5D2 combination and I absolutely love it. 7D for reach and speed, 5D2 for pure quality. It may be discontinued, but it will stay with me for a long time.