One can see the approximate schedule of card/pack drops from previous cycles on 2KMTC:
Last year, in 2K18, on the day before Thanksgiving, 2K dropped the Swingmen set, with Amethyst T-Mac as high packable card, and Amethyst Granger as set reward:
Also dropped a batch of Moments, but nothing that was a big deal
It was apparently just the next week when they dropped Milestones, with AM KG as Set Reward…and AM Magic as the high packable card:
If I remember correctly, that Magic started off going for well over 300K:
Buying that Magic, later on, with a Shoe, for about 190K, was a big mistake for me. I’d built up some 700K in MT and got itchy about buying something expensive. I thought I had capitalized on a nice price trough, but the card, and the market in general, was on a downward trend.
2K just kept dropping nice stuff all throughout December, and the Kobe RU/AM/DI/PD Signature drop was a few days before Christmas and was a massive hit to the market.
I would be prepared to for a bearish market from this point onward. It would make sense for 2K to dampen down AH prices for people jumping into the mode with Black Friday, and progressively tank the market for the influx of newbs who will come onboard with Christmas.