You must choose: history or sci-fi? No time to explain. Pick now. No do-overs. 3. 2. 1. Time's up! Huh, that's your decision? Interesting. You'll have to stick with that. Okay, now there's time to explain: Paradox have announced a release date of April 6th for the next Europa Universalis 4 [official site] expansion, Mandate of Heaven, which is also the release date for Stellaris's Utopia expansion. What are you going to do, play them at separate times? Tch! So if you chose history, you can look forward to an expansion focused on China and Japan.
As is common with Paradox's expansions, Mandate of Heaven is a mix of new themed content and universal systems changes. On the themed front, Paradox say:
"While Europe slowly pulls itself from a period of darkness, the East continues to shine brightly. The Ming throne is set on a foundation of thousands of years of civilization while Japanese warlords do battle in honorable array, holding tight to their bushido code. The gods have blessed Asia with wealth and culture. Are you worthy of the Mandate of Heaven?"
Ming China will get to play with Imperial Decrees and Imperial Reforms, as well as demand tribute from neighbours. As for Japan, Paradox say:
"Daimyos now owe loyalty to the Shogun – and the Shogun is whomever controls the imperial capital of Kyoto. Force your lesser rivals to commit seppuku to preserve their honor."
As for new global systems, expect historical Ages and Golden Eras:
"Meet objectives in four historical ages from the Age of Discovery to the Age of Revolutions, earning new bonuses and powers for your country. Declare a Golden Era to further increase your chance of success."
You've made your decision and now you'll have to live with it. Mandate of Heaven will cost £14.99/$19.99.