To OP: I think it's bothering everyone and if you look around, you'll see plenty of posts, comments and even videos about this. There is a limit to how much time one should spend on looking for a game patch and I must admit, that I'm checking this site way too frequently for the news. It's a bit frustrating pack/gold spending wise, and I know some people have been holding onto their packs since early December.
If we should try to theorize why nothing is announced yet, it could be that team 5 have become extra cautious with announcing anything, before the full set has been properly tested? That COVID might have delayed something? Maybe they know that you'll hold onto your resources, so this is a strategy to make you lose your patience in last minute? The leak might have been a full on prank or maybe they just postponed to mess with people who trust in an otherwise truthful leak? Maybe they want to surprise people or motivate people like us to get more engaged in the community?
I too am eagerly awaiting the announcement. In a reddit thread two weeks ago, Iskar said this about the mini-set: "It's still happening. Not quite ready to announce a date or tease any cards but we'll share that info in advance of the release day." So I'm not sure if the supposed 21st of January leak is real. Maybe it's the announcement + duels update or something, with release next week. It must be soon, though.
Its just a leak nonetheless, it migth not be true, but, if it is, there were some changes that blizzard have announced with a day or even less time, lie the hall of famme for Vanish one whichm came inmediatly after the announce, in the middle of an expansion