An announcement when they do would be nice, rather than just hearing it from friends. Lightfall didn't exactly interest me, nor did any of the seasonal content since I've only played bits and pieces after Forsaken and just the campaign of Beyond Light. I'm mainly back since there are numerous sales that me and my wife have been playing through and I'm bursting through the seasonal content now after wrapping up The Final Shape.

I should think there'll be something about its return ahead of time, in a TWiD perhaps, since it was a highly requested shader. Until then though, I'm afraid you'll have to wait. Maybe it'll return for Festival of the Lost?