For reikland/altdorf we have:
Karl Franz: (confirmed) the emperor and elector count of reikland/altdorf
Kurt helborg: Grand master of the reiksguard knightly order and supreme commander of the armies of the empire
Ludwig schwarzhelm: the emperor's champion (gameplay wise could be a great way to introduce standard bearer hero mechanics. And duels for that matter if those features are even ingame)
Volkmar the grim: grand theogonist of the church of sigmar(the pope, chief warrior priest)
Balthazar gelt: supreme patriarch of the colleges of magic(leader of the empire wizards)
No representatives for engineers(not a special character one at least) but I'm sure they will be represented as well.
These are the special characters that are in altdorf/reikland, the only confirmed faction for the empire race.
Anyone want speculate on the other races or subfactions?