It comes with new laws, traits, titles and over "100 new events" to tread cautiously through. There will be a TwitchTV live stream event today starting at 9 am PDT / 6 pm CEST.
You can watch the live demo through Paradox Interactive's. Crusader Kings II project lead Henrik Fahreus will be leading a walkthrough and a Q&A.
"Henrik Fåhreus, project lead on Crusader Kings II, will guide you in your quest to experience the Crusades from the other side. This includes a walkthrough and a QA session from the community via chat. Take this chance to see the developers talk about the game and tell you all the inside information from behind the scenes," said Paradox.
"So tune in for a live Developers Showcase of Crusader Kings II: Sword of Islam!"