Will we be allowed to remove native peoples?

It wouldn't be too bad:
-You build the 'Genocide/Expel' which replacings a particular 'People' building which gives you MASSIVE penalties to growth, health, public order, trade, economics and takes a few turns to build(maybe 1 to 2 ingame years). That way you need to pile a ton of soldiers in there.

-When it completes, you get the option to bring in your people by building a settlers thing. Perhaps also spawn a large army as well when it completes to represent an organized resistence of survivors.

-Then you can finally build your people marker.