I was tired of hoping to see Darth Event pop into the game, so I asked, like many of us, the question yesterday in the Q&A.
Q: Will there be a Darth Revan event this december? I hope so, a lot of use were hoarding mats for him! Thank you.
A: CG_Tophat - Darth Revan will be included in the Journey Guide. So as soon as that's live, you'll be able to get after it.
At least now we have an answer, which is "Just wait for the Journey Guide!" :-)