It seems there is something new coming:
http://wiki.totalwar.com/w/Regiments_of_Renown
I am personally sceptical. I would have expected a unitpack like we got for Nappy with special units which were all unique and fancy looking. This looks like and they say that just a simple reskinn of already existing units. The only think i like about it is to get finally units with better stats. However if they choose to make the Knights of the Pantherorder etc. just reskins of the normal knights i am quite disappointed.