I have to get some of the codes painted or inked up so I can give the gamer some idea of what he's buying! :-) That's been the main impediment so far.
Also some of the codes will be usable for either the 13th C or our existing 14th C range, such as the Cumans and Szekely border horse for the Hungarians. Also Welsh archers, Teutonic auxiliaries, etc. So I should really release those first for the 14th C range, and then make sure they are consistent in the 13th century line. There, aren't you sorry you asked now? ;-)