>>46260499DPPt remakes, but they're actually like super good. Tons of SOUL, postgame Arceus episode with Giratina being the "boss" at the end, the Distortion World has unique mons (either Distortion World Regional Variants with wacky types, or new Ultra Beast-type guys), only one or two new characters added here and there, Darkrai, Shaymin, full access to the entire Dex again, Galar included, but most are only available through transfer or postgame (maybe a Sevii Islands-style area to stuff them all in.
Sinnoh regional variants of old mons, a few new evos (not megas or anything, just straight-up new evolutions for old mons). If they want Dynamax to come back, just rope Eternatus into it, his lore fits with Sinnoh really well (it's all Biblical shit). If they do that, then we get a unique Archeamax or Alphamax or something for Arceus, and you use it against a Distortomax-or-some-shit Giratina in that postgame episode. Battle Frontier is back too.
Also, Let's Go Togepi and Pichu are announced at the end of the trailer, not very much attention is drawn to them, just a little "hey, this is happening!"