Dark Ages Total War: Early Era

I'd like to hear from the community (not just modders) about what factions they would like to have in Dark Ages Total War, considering it is the community that will be playing it, and I would like it to be as fun and enjoyable as possible. Also, suggestions beyond which factions to include are welcome, such as units (must include evidence for such a unit, as were sticking as best we can for historical accuracy ), faction symbols (for flags and prebattle), and kings and heroes (again historical accuracy).

We already have for the early period (as a reminder, the early period starts at 632)...

Britons
Irish
Picts
Scots
Anglo-Saxons
Saxons
Norse
Neustrasians
Austrasians
Burgundians
Basques
Frisians
Suevi
Visigoths
Bavarians
Lombards
Beneventians
Carinthians
Avars
Bulgars
Khazars
East Romans
Sassanids
Arabs (In need of naming)

For High (Starts in 800)

Irish
Scots
Welsh
Wessex
Norse
Holy Roman Empire
Asturias
Aquitiane
Bavarians
Beneventians
Moravians
Polanes
Bulgars
Magyars
Khazars
Volga-Bulgars
East Romans
Cordovians
Tahertians
Aghlabids
Abbasids
Abkhazians

For Late (Starts 912, a supposed time of the "conversion" of the Khazars to Judasim)

Irish
Scots
Wessex
Norwegians
Sveans
Danish
French
Holy Roman Empire
Astrurias (Leon?)
Burgundy
Italians
Papacy
Bohemians
Polish
Lithuanians
Magyars
Bulgarians
Cumans
Kievians
Rostovians
Volga-Bulgars
Khazars
East Romans
Abkhazians
Seljuks
Armenians
Abbasids
Tulinids
Tahertians
Aghlabids
Idrissids
Cordovians

Again, any suggestions as to the line up for the early period are welcome, as are units, flags, kings and heroes.