According to the official post, these weapons are called the Swashbuckler’s set, but they aren’t the end of the rewards. The developers also hinted at “decoration trophies, unique titles, a unique color crystal, a beaut of a mount, and a Top 96 character reward” to be revealed later.
[Source: BioWare post]SWTOR teases season four PvP rewards
In previous PvP seasons for Star Wars: The Old Republic, players never had a clue what the rewards for their efforts might be until midway through the season. But this time around, BioWare has teased us with a single image of the weapons we can expect.