As the first part of "Vikings" season 4 ended last April 21, the latest spoilers have hinted that Ragnar Lothbrok (Travis Fimmel) is up for more challenges as he tries to prove his worth as a leader.

How would he prove himself then as the King of Kattegat? Are there new villains that he is expected fight?

According to Michael Hirst, the writer behind the historical drama TV series of History channel, the upcoming second half of the fourth season will surely make fans "cry buckets," as they realize that it was indeed a good thing that Rollo (Clive Standen) did not kill Ragnar, spoilers from Breathe Cast disclosed.

The report further dished that in the second installment of "Vikings" season 4, which features a six-year time jump of events, Ragnar will finally face his grown-up sons in Kattegat.

Meanwhile, Bjorn (Alexander Ludwig), Ubbe (Jordan Smith), Hvitserk (Marco Ilsø), Sigurd (David Lindström) and Ivar (Alex Høgh Andersen) will make it a point that everyone will recognize the fact that they are not easy to be messing with.

In the meantime, the newly released "Vikings" season 4 Comic-Con teaser of the upcoming highly-anticipated episodes shared on YouTube has made the fans extra excited as certain spoilers were hinted.

One fan speculated that Ragnar is going to die son which another fan supported saying, "Yeah. Now, when i seeing him in chains, it's have left me with no other options."

"This is something that will get us hyped until the release of the full trailer," another follower wrote.

While their excitement was apparent, it can also be observed that some of them were disappointed to noted that no official release date has ever been teased yet.

"Still, no infos [sic] about the release date of the first episode?!"

Keep posted for more "Vikings" season 4 spoilers here.