Vikings season 4: Episode 17, end of reign for Lagertha? The synopsis unveiled

In a few days, History will broadcast episode 17 of season 4 of Vikings, which is revealed via its synopsis, indicating the possible end of the reign of Lagertha!
Checkmate ! While we were wondering which character would be the next to die in season 4 of Vikings , the American cable channel History continues to promote its flagship series. Thus, after the promo video, now is the synopsis of episode 17, entitled “The Great Army”, that reaches us. This indicates that “The Viking army starts to gather in Kattegat ‘ , but mostly we read that ” Lagertha must remain vigilant in the absence of her son, Bjorn ” . Ominous words for Ragnar’s first wife, who certainly committed the irreparable by killing Aslaug. As we understand with the promo video, the son of the latter have the ambition to be a great army, an army twice more impressive than that of their deceased father , and one of their target will undoubtedly Mother of Bjorn.
We have included some detail the trailer (like the characters haircuts) he has passed some time since the events of Episode 16. Ivar in good strategist will have had time to set up his plan to remove Lagertha its role as Queen of Kattegat . Besides, we can see him arriving determined in the throne room, as if it were time for him to kill her. It remains to be seen whether all the Ivar pieces are in the right place at the right time to allow him a first significant victory. Recently, Travis Fimmel and Michael Hirst returned on the death of Ragnar, occurred in Season 4 Vikings! What do you think of this synopsis?