Slitherine

First of all, I would like to say that, as a student of history who currently studies Ancient and Medieval history, I truly appreciate this game. It is an absolute gem. It literally makes my studying easier, because when I read about a battle in one of my books, I can instantly recreate it, or even find it already recreated, in this game. The sheer authenticity of this game literally makes my world a better place.
Now for the question: Will there be an expansion (or expansions) up to and including the Fall of Constantinople?

The devs have mentioned that (unofficially) the plan as it stands is for the game to cover something like 2000BC - 1500CE.

My guess is that the game will remain in the current geographical limits, and I would hazard a guess at 3 more expansions - 1 for Biblical, 1 for High Medieval, and 1 for Late Medieval. The devs previous game, Pike and Shot: Campaigns, picks up at 1494.

All such information is yet to be officially confirmed, though - Slitherine tend to be tight lipped about future plans until they are set in stone and ready to be announced.

Look at the previous Field of Glory Army list books to see what might be coming in the future, they included the whole medieval period and everything up to the Fall of Constantinople

Thank you. I suspected as much. I can't wait to see which period they do next.