Well, the whole Unite thing has finally converted me over to the "I don't want DP remakes" crowd. Not because of a sudden drop in confidence in Game Freak or anything but because of how I've become exhausted over the whole concept with how much people have been begging and screaming for it and upon mulling it over I'd much rather GF expend the effort on other projects, Pokemon-related or otherwise.
Like DG said, if something Gen 4-related must happen, just go with Platinum Remastered or something. Honestly nah I don't even think I want that anymore, just slap a couple of ports of DPP onto the Eshop and be done with it.
Anyone familiar with GF and Nintendo's core series marketing strategies would have known that DP remakes weren't coming. For the past eight years, Nintendo has aimed to publish a new core series game just before Black Friday (aside from the 2015 gap to presumably line up the 20th anniversary). When they do this, new regions have more content to show off and draw out the hype, so they're revealed about 9 months in advance (which since 2016 has lined up nicely with Pokemon Day). Games that aren't new regions have less content and get revealed about 5-6 months in advance instead (which instead lines up nicely with E3).
So to back up a bit, when a Direct was announced for Jan 2020, it couldn't have been either DP remakes or "Ultra SwSh" - either Nintendo would miss Black Friday or they'd have dry bare-bones content reveals spread out all year.
Now of course it's obvious that IoA and CT are intended to take the place of any "Ultra SwSh", and GF pretty much said so during the Direct by comparing them to Platinum and USUM. The DLC now takes the spot of "this year's core series release" and there's no way they're going to announce another one before the beginning of 2021 at
least. A Let's Go Johto would count as a GF core series release for this purpose (their own marketing).
One other thing that we could have seen coming but was unfortunately lost in translation was the Japanese name of the video, which ends in 発表会 ("announcement") and used to be always translated into English as "Press Conference". They went with a different name this time ("Presents") due to it not actually being live with press, and this unfortunately probably gave the wrong impression to a lot of people that it was going to be more Direct-like (which focuses on core series games). Instead, we should have expected reveals similar to the other Press Conferences - almost all mobile games and apps (Go, Quest, Home, Sleep, Masters). New Pokemon Snap (and Detective Pikachu sequel from 2019) turned out to be a nice surprise, but as non-GF spin-offs they don't interfere with the already-established core series schedule. (Yes, the 2018 Press Conference revealed Let's Go, but the timing of that announcement fit into the core series schedule, and any Let's Go Johto reveal wouldn't.)
No way to prove this now, but I was originally going to shitpost something about the Gen 2 background plushies secretly being for "Pokemon Quest 2" hypothetically adding blocky pixellated Johto 'mons to the Kanto-exclusive Quest. Then we got something very entirely different....
In any case, there's no way I can believe we're ever getting a DP remake announcement until something like May/June 2021, May/June 2022, or May/June 2023. (This means that if E3 2021 comes and goes with no hint of a DP remake, we shouldn't expect it for another year.) Anything else would mess up their prerelease marketing and Black Friday sales, pointlessly reducing their revenue for no benefit.