Global super event

What about a rare event that is literally on for days or weeks at a time. For example, an army of brahgins or something attack hakains crossing and there's a huge war that lasts a long time. Or one of the titans invade, or a new world boss and attacks hakians crossing and all players have to try to defeat it on its way to the city. I don't know what everyone else feels like, but i feel like a really rare, random event like this would add a lot more depth and excitement to the game as there would be no announcements, warning or news about it until it happens. It would really give the game some surprise and add to the fantasy/ magical theme of the game. Tell me what you all think!!

Thanks so much for your time, riders! ~ Decapatron ;-)