May be next year. This one was done quick to catch up with the Halloween month.
Maybe because I never made a "Halloween Special" myself, but I dunno why some leave their holiday specials until last minute.
Or maybe the people who made this DLC did not and it was the best they can do even with plenty of time provided.
For example, I don't know the first thing on how to make a level mod for Sonic Adventure 2. But if I did, I would make a Christmas-themed winter stage for Knuckles replacing Pumpkin Hill. I would begin work on it at least early November so that I would at least have headway over it and
maybe finish it by late December. And even if I don't finish it in time, I would have eleven more months to work on it now and then before next Christmastime.
And that's just presuming I have the knack of or basic understanding of making custom stages for SA2B. Given I hardly see any custom stages, I imagine it's not as easy as I make it sound.
I understand though, that it is also due to scheduling conflicts. I remember a few years back, I think it was Sonic Speed Simulator's first winter, Sonic Speed Sim had that tower event as well as promoting Sonic Prime at the same time, so the Christmas event started a day before Christmas Eve and it was the bare-minimum, unlike the Halloween Event that lasted throughout October and introduced Pumpkin Hill.
All in all, I know Memories Beyond is the upcoming Sonic animation, but I hope they splash some money towards another animation studio or IDW comics for something for Christmastime... or at least give some money over Balena Productions.