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.
5D3, 5D2, Sony α6000, G16 | SY14 f/2.8, Ʃ20 f/1.8, 24 f/2.8, 35 f/2, Ʃ35 f/1.4A, 50 f/1.8 I, Ʃ50 f/1.4 EX, 100L Macro, 17-40L, 24-105L, 70-200 f/2.8L IS II, 1.4x II, 70-300L, 100-400L | E-mount: SY12 f/2, Ʃ19 & 30 f/2.8 EX DN, 16-70 ZA OSS, 55-210 OSS, Metabones SB | FT-QL, AE-1P | FD(n) & FL lenses