Season 2 left us with Ragnar replacing Horik as King of the Danes after a brutal overthrow. "We have some fresh blood", Michael Hirst (the creator) said, "We have the Frankish Emperor, who's the grandson of Charlemagne, and his daughter. These characters are very important and the storyline is very big." Additionally, according to Hirst, "Season 3 really marks a huge upgrading in the vikings endeavors. This is the dawn of what will become known as the viking age."
The released teaser was narrated by The Seer and painted a bleak picture of where things are headed as the ambitions of the vikings grow. Epic battles, slaughters, severed heads, torture, it's all there and it's just getting even better.
For now, Vikings is renewed for 10 episodes and is set to premiere in early 2015 on History, but Michael Hirst also mentioned that Vikings may continue until the raiding parties reach America, which by itself promises at least a few more seasons of this epic drama.