It is confirmed that there will be a third movie, but nobody knows what will happen and so I came up with an idea:
My idea is that in this movie it will be revealed how this war started. (a story needs an origin)
Early in history, humans and Moors lived in harmony until an evil fairy secretly started the war killing some humans and incriminating other Moors and he gave birth to this war because he loves violence and massacres.
During these centuries he heard several kings who wanted to end this war and he always prevented peace from being restored (he rarely appears when he doesn't need to appear for the war to continue).
He is revealed as smart because he not only managed to make this war last for centuries but also managed to hide his own existence all this time.
He will also be revealed as responsible for the death of Ingrith's brother because he knew it would continue the war for a few more years.
If this character exists (although this is all just an idea and may not even be true), don't even imagine what will happen.