The patch 184.108.40.2064, named “Allen Newell”, includes a lot of balancing changes and AI fixes, in addition to new content like the “Great Zimbabwe” wonder and movies when you discover a new technology! You can read about all the changes here.
The “Cultures of Africa” DLC includes 6 new cultures like the Bantu and the Maasai. All these new cultures have their unique play style, and the DLC includes further also 5 new wonders and new events. You can discuss this DLC in our forum here. A first video showcasing the DLC by WD Gaming has been embedded above.