Revealed during today’s Star Wars and Disney Parks: A Galaxy in the Making panel at Star Wars Celebration, it was revealed that the destination for the Episode VIII segment of Start Tours will be Crait, which was seen in the trailer that was released a day before.
According to Wookiepedia, Crait is a planet in a remote, uncharted section of the galaxy. The planet was rich in minerals—such as the white dusting of salt over red-colored mineral based surface—and hosted mines to extract them. During the early rebellion against the Galactic Empire, the Rebel Alliance had an outpost on Crait, until its abandonment prior to the Battle of Scarif. Many years later, some time after the destruction of the First Order’s Starkiller Base, the planet was the location of a battle between the Resistance fighters and several walkers.