"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
See more information from following sources. You want to see the trailer:
Official site: Total War
Steam site: Total War: Warhammer (with trailer)
Youtube: Total War: Warhammer (Announcement Cinematic Trailer)
18 April 2015
You can find The End Times Timeline and The End Times Map from the Universal Rules & Timelines -page.