1) Will it cover the Balkan Front and Caucasian Fronts as well? What about the Mespotamian front (my play buddies are mostly Turks and they of course want to play that front)? Or will these be future additions?
No, just the eastern front. At present, the other fronts you mentioned are to be released as two additional games.
2) Will combining TTLM and AAC increase the play time required?
Really, I can't see how it wouldn't, especially if playing with only two people.
3) Will combining TTLM and AAC permit 4 or more player games?
Thank you for you work.
You're quite welcome.