shadows in flight is about Bean's children, and shadows alive is about them meeting with Peter and Valentine from Children of the Mind. Beyond that, idk since I haven't read them yet.
The formic wars are comic books, right? I haven't read those (and don't really plan to tbh).
Shadows in Flight was released on Jan 17. I read War of Gifts and am halfway through Ender in Exile. I put it down to reread the Shadow series first, since I was intending to reread them and they sorta lead into the second half of Exile. I'll get to Shadows in Flight after the original Shadow quartet + the rest of Exile. Then maybe Shadows Alive will be out. ^.^ (I read REALLY slowly...)