Not sure if the ability to place timed events will exist in DOM_3, but at least the devs saw the idea.
Being able to setup unique events for nations and/or provinces can make a map more interesting... such as earthquakes, volcanoes, floods and/or creating a storyline for gamers to experience.
example:
Event: Give ERMOR
Commander: Demon Knight
Items: Marble Armor; Amulet of Antimagic
Units: 30 Demon Knights
Guards: 2 Devils
Province: Ermor Capital
Day: 58
post message to human players:
"Ermor has recalled his greatest knights from a distant land to remove his enemies from this realm."