Some extended thoughts on various aspects of the reveal:
New mons:
New mons are my favorite part of a new generation, and I love that USUM started introducing entirely new mons, not just forms, in third versions and it continued with DLC. I am also very glad that we're getting at least a couple of non-legendary mons, and I hope there's a few more to be revealed. (For this purpose I will count Iron Crown and Raging Bolt as legendary!). I plan on running through the DLC stories with new teams for each, just like how I used different teams for each of the main stories, so hopefully there are some super cool new mons to use. That said...
Dipplin:
I appreciate the concept, and it's definitely a curveball, which is cool, but it's not something I currently see myself using on an in-game team. Certainly is curious that they mention two worms being in the apple...
Archaludon:
Also very unexpected and therefore neat, and while at first glance it looked like it could be cool, after seeing more of Archaludon it became clear that it does not solve the fundamental problem that Duraludon has, which is that it just looks so incredibly stupid when it does its attack pose:
What is this nonsense? I appreciate certain ridiculousnesses that some mons bring to the franchise, but this is not it. It just looks so dumb. I get it, it looks like a bridge, but couldn't they have made it look cooler somehow? Centiskorch pulled off looking like a radiator pretty naturally, why can't they make this line work?
Given that Archaludon gets a signature move that's electric-type, it make me wonder if it will get a special electric type terastal form like Ogrepon has.
In any event, probably not going to make it onto an in-game team.
Iron Crown:
At first I thought this looked pretty sweet, but then the art was revealed and it turned out that its awesome antlers are just lasers, like Iron Leaves' neck blades, which is a bit less cool. Overall its ok, but it still feels like Scarlet paradoxes got the better designs. I would maybe use it on an in-game team if it can be acquired earlier enough in the story (and if through raids like Iron Leaves).
Raging Bolt:
Of the new mons revealed yesterday, I like this one the most. I do wish its head looked more different from Raikou's head... like maybe give it a beak or something more dinosaury to not just look like Raikou with a long neck, but otherwise I dig it. I like how Raikou's lightning tail got redesigned into the frills along Raging Bolt's back. In contrast to Iron Crown, I thought the art made Raging Bolt look better than the in-game scene, though maybe because it covered up RB's face. I will consider using this on my in-game team, though it will depend on the other available options.
Terastalized Ogrepon:
Uhhh... I was not expecting a special terastalized form to just be Ogrepon holding a really big version of its mask... Would have liked something more interesting looking, but maybe it's not all there is to the form. I guess it has kind of a studio Ghibli giant head vibe to it...
Otherwise, Ogrepon itself is something I would use on my in-game team if available in a Kubfu-like fashion, but I'm guessing catching it will be the end of DLC part 1.
Terapagos forms:
Not a new reveal except that we got confirmation baby Terapagos is really the normal form and big Terapagos is the terastal form, which as I mentioned in an earlier post does not bode well for the much cooler form making it out of gen 9. Otherwise, Terastal form Terapagos is still the best design of the DLC mons. I hope that normal form is available early in Indigo disk, and if so I may just use it on my team. (I sure hope it is not as useless as its flavor text makes it sound, though).
The loyal three:
Even though these aren't new reveals, people have been speculating that the moves they used in the trailer are hints at their types. The wrench in this theory is that Okidogi looks like it's using Giga Impact, which would suggest normal, but this is not one of the types on the Teal Mask key art:
I fully expect that the types of the loyal 3, and Ogrepon, correspond to the types on the lanterns in this image. If Okidogi is actually using Meteor Assault, which as also been speculated, then it could hint at Poison/Fighting for Okidogi, Poison/Psychic for Munkidori, and Poison/Fairy for Fezandipiti. While I would kind of like Fezandipiti to be Poison/Fighting, just so that we get yet another fighting-type bird, I will happily take these types if it means Munkidori stays the hell away from the Ghost type. Please don't let Munkidori be part ghost. Pleeeeease GameFreak. On that note, if we're speculating types based on moves they use in the trailers, it should be noted that they have also been shown using dark, ghost, and flying moves:
Dark and flying are not on the lanterns, so hopefully Munkidori using shadow ball is just because psychic types often have shadow ball...
Depending on Okidogi or Fezandipti's types, and whether we catch them early enough in Teal Mask, I might use one on my in-game team.
Other assorted things:
BB League Elite Four:
It sure looks like this Elite four is going to have at least 2/4 type overlap with the Paldea E4. Amarys has her hair done up in screws, so she has to be steel, which means Drayton's gotta be dragon. I wouldn't be surprised if Lacey is ground, giving 3/4 overlap; her Japanese name apparently refers to Taro root, though I guess that could also be an indicator for grass. Crispin gotta be fire, though, surely. He looks it and it showed a Magmortar right after a shot of him on the battlefield.
Maybe GF will throw us a curve-ball for once and this E4 won't just be single-type specialists, but I'm not going to hold my breath.
Club room:
The trailer made it sound like we might have some freedom in decorating the club room, but from the look of the rooms they showed I will be pleasantly surprised if we get to do more than just pick a theme based on one of the types.
Perrin, photography quests, & the Timeless Woods:
I think it's cool that there will be some photography mini-games in the DLC, kind of like an off-rails (but presumably much more limited) Pokemon Snap. (The balloon mini-game is less interesting to me).
Perrin, descendent of Adaman, worshipper of Dialga, lord of time, wants to take a picture of some Pokemon in the Timeless Woods. While this could be a new Pokemon yet to be revealed, it also feels like it could be Celebi, another time-travelling Pokemon that would fit in well in a region that seems to have a lot of Johto mons in it. The last few games have made several mythicals available in-game (mosty through save-data gifts, but Keldeo was freely available in Crown Tundra), and Celebi has yet to receive this treatment in 3d...
Mass outbreaks:
I'm guessing these outbreaks will have fewer individuals in them compared to regular outbreaks, so that if you're farming shinies or the boosted mark you'll actually have to jump from one outbreak site to the next. It's nice that these will provide a means for players who don't have the DLC to get some newly added mons.
Closing thought for now: although we got all this news three days before the World Championships, I wouldn't be surprised if we get another competitively relevant reveal at the opening or closing ceremony. If there are terastal forms beyond Ogrepon's, maybe we'll get a reveal of that then.