All Hail Vikings' King Ivar In Intense New Trailer

It certainly looks like him. There is reason to believe he could survive the season, though. Vikings has historically messed with reality. Something that could, theoretically, make this a vision, and not real. Having watched this part multiple times, it does appear that the man resembling Rollo may have fallen to the ground. Or he is laying there, and his arms are being manually pulled, causing it to look like he is moving.