"It is an age of endless conquest, thousands of warriors clash in titanic battles as entire races wage war on one another, each led by a formidable hero seeking dominion over the world." -text taken from the official site
Check out new Gameplay Walkthrough - Greenskins Campaign ESRB: Gameplay Walkthrough
The Old World campaign-map looks really great! And Norsca is there too, yes!
See more information from the Official site: Total War