The ship in the picture couldn't reach America, it would break on the waves. They used smaller ships to cross, the big ones were used for rowing or sailing along coasts. Also, the sails weren't striped, they were woven diagonally, forming a checkered pattern.
The ceremonial horned helmets are from the bronze age. Perhaps some viking had one as well, but not in battle. Just imagine how impractical that would be - there is a great risk of getting hit on the horns, thus losing the helmet or breaking your neck...
I hope there will be horns in other colours as well - a pair of tan ones on the Yeti will make it look more like a Wampa than the bananas!