The guys at IGN PC have revealed a new planet called Dxun that will be visited during your journey through the upcoming KotOR sequel. Check it out:
Dxun is the largest moon in the Onderon system, with dense foliage and inclement weather. The beasts that stalk the jungle are some of the most vicious predators in the galaxy, and many explorers have vanished not long after touching down on the surface.
The trails are nearly overgrown, but many craters and wreckage from the Mandalorian War lie buried in the jungles... as well as the corpses of thousands of soldiers who died during the Republic's final assault on Dxun.
Dxun is a moon to Onderon, but they are almost sister planets, and they even share a bit of the same atmosphere. Travel between them is a short shuttle ride away.