User blog comment:UnofficialGameExpert78/Age of Empires II HD: The American Tribes/@comment-2A02:120B:C3D1:D140:986B:9AB3:E610:F882-20181025111448

I really hope we get a Precolumbian DLC next. I personally think such a DLC would feature Mississippians, Iroquois, Mapuche, Chimu and maybe Tarascans with two new architecture sets (North American (Mississippians, Iroquois) and Andean (Mapuche, Chimu and Incas)).

Problem with the Anasazi (Pueblo) is that they don't want to be represented in a computer game (Civilization 5 devs wanted first Pueblo in the game but after contacting the local chief they said that they didn't want to be part of a computer game). Their opinion may have changed in the mean time ofc.

I personally would only make the Mapuche having cav as special trait. It's also reasonable in terms of history because they quickly adapted Spanish technology in their warfare afaik.