I finished the Zolotonosha scenario, and after also the Vyazma. Then I could choose between Moscow and Demyan pocket. OK. BUT! :-) Where are Ostrov, Novgorod and Leningrad41 scenarios?! They shoud be after Zolotonosha... I tried marginal victory on Zolotonosha, even tried to loose but I always get directed towards the Vyazma scenario!
You are given the choice to act against the Kiev pocket or the Leningrad front after Smolensk. Both paths are 3 scenari long before linking back for Vyazma.