As Lynk said, the event ends on the 24th.
So I defeated Zam Brak, the world boss at the Sarlacc Pit with an ops team. It was fun. We tried Urtagh, but apparently were with too few to defeat it and there was one Jedi Shadow harassing us, attacking the tank and then fleeing. Cowardly pubs!
Also, I've read Trapjaw can be done with a two, even solo if you're good. Obviously, that'd be pretty asocial, knowing that the boss takes hours to spawn, so I don't intend to do so, but I'm guessing this one's pretty easy, then?