My guess is we're going to a teaser trailer, but not a full 2:00+ min one yet. Also perhaps the release date. Interesting that only Patrick Stewart and Gates McFadden are the only cast on the Picard panel. I guess this means Beverly Crusher does play a big role in this season.
Update: Terry Matalas has all but confirmed on Twitter that we're going to get a trailer.
I think the main focus in terms of trailers and such though will likely be Lower Decks, and probably a short teaser trailer for S2 of SNW.
BTW does anyone know if there is going to be another big Star Trek Day thing this year like they've done the last two years. I'm just wondering because I can't see them bringing back the TNG cast for S3 and not trying to do a big panel with the as many of the cast as possible.
Sept 28 is TNG's 35th (eek) anniversary plus Dec 13 is the 20th anniversary of the TNG cast's last adventure all together so we could get something then!