@ Arman
as far as i know, yes we'll have them, take a loook at the pages 5 and 7 (unit rooster of the cossaks) of this thread.
Here's a picture:


@ Hetman
I've read your question in the Alchemist Lab about the number of units slots that are available.
Have you removed the Jiihad and the Crusade yet ? Would be two additional slots. If not, we could remove the Jiihad (the Ottomans are strong enough) and keep the Crusade (Portugal and Spain only, call it Conquista).

Alex