Since everyone throws in their speculations, here's one scenario that's possible based on fragments of info we've picked up here and there on this forums and my wilde speculations just for fun.
I think 1c is going to bring new Eastern front content, on CLOD engine, but they'll shake the company a bit before going forward.
From what I understand, they didn't aprove Luthier's "Project Galba" and the proposed med/Africa addon, so Luthier,(maybe together with some of the programers he brought into Maddox games) will be out of the team. Since Luthier and Jasson are good friends, I wouldn't exclude seing Luthier's Project Galba (Koreea) being made on Rise of Flight engine.
Of course, this are wilde drunken speculations and I could be barking, not only to the wrong tree, but to the wrong forest.