TheMarshmallowBear
Benelovent Chieftain of the Ursu Kingdom
Mona Lisa is also in the trailer but she's not gunna be a leader. I don't think having an abstract picture of him in the trailer means means much for him. If it was in vaguely civ VI art design then yeah. Otherwise he's as much an ideal of peace and modern democracy and political freedoms as he was a person, and most likely is there to visualise a related topic they are mentioning in the vid.
I reckon he'll be in, I just reckon even if he wasn't, he still woulda been in the vid
But she "is" in the game... as a Great Work, further confirmed by their run-through of the annoucement trailer.