And, why is that? If they make another Allied faction, the only real ally to the German Empire was Austria. Serbia and the Ottomans did jack shit other than take part in conflicts that did little to nothing to effect the outcomes the war. Personally, I do believe Austria is worthy of being featured in the mod, with or withouth the Italians and Serbs in it.
But, as usual, it is up to mod the developers. What we know so far is that France and Germany will be apart of the first release, followed by the British. We haven't been told of the plans after that. For all we know, Iron Europe will be just a WWI overhaul of NW featuring the same five factions.
Either way, I am content with what is released. Even if they do not decide to do Austria, the meaning two factions can be used for other nits in each faction. A collaboration of sorts from each alliance. So, one faction can feature the Serbs, Croats, Austrians/Hungarians, and the Ottomans. The other will have the Italians, Russians, Spanish, Flemish, etc.