No idea, but I'm thinking the end of April, or roughly May 2nd to kinda like up with "Star Wars day". The last one was the end of January, so roughly 3 months sounds right. I was worried that he would be needed for Darth, and they'd have to drop him early, but not being needed for DR, should be at 3 months.
They are bringing Darth Malak so i wouldn't be surprised if Jedi Knight Revan comes back this month or earlier on the next one to make another panic farm.
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They don't always follow the same cadence: CLS and JTR certainly didn't.
A better way to know is... simply check the calendar...