> There is really going to be around 50 nations?
Yes, but some are oldies remade. Niefelheim is more or less what it was before, but they got some skinshifters and a new Niefel Jarl Hero, Tjatse with the eagle cloak, abductor of Idun and the apples of longevity.
TC S&A has new sacred warriors of the five elements.
Other nations have more or less new unit setups. Ermor in the early age has less modern legionaries, augurs, pontifices and equites of the sacred shroud.
Some nations are entirely new such as Marverni, Agartha of three different ages, Sauromatia & Yomi/Shinuyama/Jomon.
All in all there are about seven nations wich dont resemble old ones or new ones (counting agartha as one), twelve or so nations with some resemblance to old or new nations (early ermor, agartha of other eras), and a lot of nations and old themes with some changes to units or balance (niefelheim).