Oleg has already invested in a bunch of Italian aircraft that had only a tiny impact on the BoB theatre, and an army of early-mid war British and German ground units that had no impact at all on the BoB (except the AA guns).
All of these would however be essential in a Mediterranean/North Africa theatre sim, and reinforce the more or less open secret that the first sequel
is going to be set in the Med.
Of course, with the third in the series (specifically referred to by Oleg as the third, and being developed by a new team that has recieved a grant from the Russian goverment to develop a "Great Patriotic War" simulator) already having been announced as Il2: Battle for Moscow, and Luthier's Project Galba (based in the Korean War) already having had most of the 3D models made, I think it is safe to say the future of the series is thoroughly planned out.
Of course, there might be 3rd Party additions to flesh out the period after the Battle of Britain, after all, the ground work has already been done (literally
), and all that would be needed are the aircraft. There are already several models that have been lying around for years now waiting for SoW that would fit this gap, assuming the projects are still alive (Typhoon and Lancaster are two examples), and I'm sure the Il2 modding community will jump into action once the third party tool kit becomes available.
Also, some of the needed aircraft will arrive as a by-product of the Med expansion, IE Bf109F, Spitfire V, Hurricane II.