Friend of mine in the field is saying the same thing as Madmarva - allegedly, it's too much of an FX film for Affleck's current comfort zone as a director.
"It's sad that governments are chiefed by the double tongues. There is iron in your words of death for all Comanche to see, and so there is iron in your words of life. No signed paper can hold the iron. It must come from men. The words of Ten Bears carries the same iron of life and death. It is good that warriors such as we meet in the struggle of life... or death. It shall be life."