Due to the fact that nothing was known about Voss prior to its discovery shortly after the Treaty of Coruscant, there is little to say beyond the information supplied on the Holonet. Voss was originally thought to be inhabited only by the Gormak, a surprisingly advanced pre-flight race. Eventually it was discovered that an additional sentient species, simply called the Voss, also call this unique world home.
Outnumbered and isolated on one tall peak, the Voss struggled to survive for centuries. Believing them to be an affront to the natural order, the Gormak attempted to eradicate their less populous neighbors. However the Voss persevered through the disciplined training of their Commandos, the fortifications of their mountain city, and the guidance of the Voss Mystics.
The Voss Mystics are Force users of incredible power. Although the Sith and Jedi agree on this point, the Voss Mystics don't accept the Force as real and seemingly want no part in it. Through visions the Mystics see the infallible truth of the future and they follow their visions in order to survive. When the Sith Empire sought the conquer Voss and the Republic sent a fleet to defend it, the Mystics knew and their actions caused an entire fleet to disappear. Now both the Sith and Republic seek to win favor with the Voss Mystics, desiring their allegiance and assistance.
The obvious setup to Voss is that both sides want the Mystics as allies. As such, both Sith and Republic players could be able to perform missions to win favor for their side or to hinder the efforts of the opposing faction. These missions might include attempting to convince the Gormak to stop their attacks, convincing the Voss Mystics of the power of the Force, or even convincing either race the opposing faction is corrupt or evil and therefore aren't worthy of an alliance.
While all this attention is being paid to the Voss, what of the Gormak? One concept art piece says: "With little more than scavenged parts, the technologically-inclined Gormak are able to craft complex weapons and machinery." Such a race would be perfect for crafting useful items from otherwise worthless junk. This could potentially allow players to give the Gormak supplies in an attempt to get them to craft weapons, advanced parts, or nearly anything technological. Although we do not know yet how crafting is handled in TOR, a resourceful race like the Gormak would also be well suited to teaching others how to make the best out of what they have. Perhaps players will be able to learn certain professions from the Gormak after earning their trust.
With the ongoing struggle between the two native species, Voss could be a prime target for developing reputation with neutral parties, allowing players to choose between allying with the Voss or with the Gormak. If this is true then we may even see certain bonuses depending on whether you side with the technological Gormak or the spiritual Voss. However, there is also the possibility that the Voss will be the primary friendly NPCs on the planet with the warlike Gormak simply being the aggressive force predominantly encountered by player.
Another concept art states: "The ruins of Voss have entrances that lead to some of the many forgotten dangers." This strongly suggests that Voss will contain multiple flashpoints. The description of Voss, and the interaction of players with the native species, seems to lead to the conclusion that Voss will be a higher level planet. With no previous or future history to consider, it would be the perfect location for high end raids or instances with planet altering conclusions.
The announcement of Voss proves that BioWare is willing to take risks and add new and inventive ways to explore the galaxy of TOR. Voss is a world of both incredible beauty and absolute desolation, as seen paralleled in the descriptions of the indigenous species. It appears that only through our time as players can the true nature of both be discovered. No matter how the story for Voss pans out, it looks to offer a uniquely BioWare take on the story and creatures of Star Wars: The Old Republic.