I really hope that Ed and his team can really pull off a great Live Stream for this DLC. My only rant about the live stream is that they are way too short. In reality they are 40 minutes and only looks at about 5 turns or so per Civ Leader before jumping to the next. They really don't do justice to the new leaders. I would like to see a full 90 min live stream.
It's really hard to show off 3 leaders in the time. Honestly most of the time they end up just using the basic civ ability and not really able to focus on the new abilities.
But overall, it's mostly just about seeing the abilities, and getting a little bit of Q+A in with the devs/designers. I really hope that @Andrew Johnson [FXS] is on the stream again - if so, then make it 3 hours and let him just talk about history. I'd watch.