Albion's story has always been one of power and consequence; it has a deep narrative, quests, and moral choices. You'll need to find your way through kings coming and going, lords smiling to your face but stabbing you in the back, and people working like dogs (and not treated much better than strays). You have been gifted ancient, god-like powers to face an enemy the likes of which Albion hasn't seen in centuries. Magic is returning to the world, and one possible resulting scenario is that the foundations of society crumble. To get to the bottom of the threat, unravel the mystery of the mages, defeat the enemy during nighttime, and conquer someone who could kill everyone in Albion.
Albion is a pleasant, leafy, verdant landscape during the day. Most of the hard work is done while the sun shines: design/manufacture products, fulfil orders from vying factions (food for the people, clothing for the Lords, weapons and armour for the King), earn money that can be spent on infrastructure, earn favours to spend in the Arcanum, bring life to buildings new and old, repair/construct walls and roads, and expand your towns and combine buildings to increase efficiency.
The land becomes completely different at night. Workers must be inside town halls when the sun sets, as the beasts emerge in darkness. You'll have to defend against waves of various creatures, build/arm turrets, hire heroes to fight, uncover/upgrade God Hand powers, and strategize your defence.
Here is the announcement trailer and an interview with Molyneux:
The heroes help give you an advantage over your enemies and open up opportunities. Each one can be customized. You can either possess them or switch to third-person mode. When possessed, you can explore the open world. Find (and found) new towns and mines, use your God Hand to help workers or hinder foes, and explore unlocked areas to find quests and treasures.
Developed by 22cans, Masters of Albion will be released for PC via Steam. No release date/window was given.