I just realized how much stuff this manga has yet to show us. ._.
20 unknown Teigu (Not counting Ultimate Teigu, Izou's Teigu or Adayusu which have yet to show their abilities), Budo's Teigu group, Revolutionary army generals who will be re-using Teigus they took from the Empire, Religious Organization is also taking a part in this conflict so we'll see them and the Lord (who is half danger beast so he'll probably have some Teigu-level abilities) again, the Western Kingdom and these "blood thirsty" characters Dorothea was talking about, the unexplored Eastern Country will appear sooner or later and who knows maybe they have technology, weapons or whatever that are on par with Teigu or something, etc.
I guess this manga really is still young. ._.