The Daily Mail was able to get ahold of what the four houses will be in the American version of Hogwarts, Ilvermorny. Here is what they said: A software engineer stumbled across their names hidden in code for the Pottermore website.
Federico Ian Cervantez accidentally discovered that the four houses of Ilvermorny are Horned Serpent, Wampus, Thunderbird and Pukwudgie.
They also offer a little description of each of these houses:
The Horned Serpent is described as ‘dragon-like serpents with horns and long teeth. They are often associated with or said to control the weather, particularly rain, lightning, and thunder. Magical abilities ascribed to them include shape-shifting, invisibility, and hypnotic powers’.