Im doubting we'll get much in the way of brand new reveals here. No Judgment 3, no other game... not even another remaster/remake or whatever. What Im thinking:
Gaiden gets the lion share of attention. Brand new story trailer, maybe the gameplay trailer as well - combat, city, mini games etc. as well as conformation on some of the main cast. We'll see a gameplay demo on stream with them showing the game off a bit. What'll then follow is a steady stream of news over the next few months including maybe TGS depending on the game's release date.
8 might get an updated release window (as in, which quarter of 2024 it launches) and hopefully a teaser trailer and MAYBE a confirmation of the city they are using. But Im guessing like when Ishin was released, they wont focus on 8 until Gaiden is out there. 8 may well turn up at TGS though depending on its release date.
These are purely my guesses though.
To have fun, some wild hopes/dreams (yume)
Kenzan gets a PS3 port that only increases the FPS, res, and QoL tweaks so that side stories cant be missed, premium adventure carries across everything, trophy list, and turtle feeding can be done over and over, rather than the 1 minute wait between feedings. It'll be called "Shadowman16 Edition" to highlight how this is purely for me alone ;)
1&2 HD get ports to modern hardware. Only changes made are the pre rendered cutscenes are now rendered in higher resolution.
Dead Souls gets a hilariously high budget remake. After its astounding success all other games in the series are now zombie games, causing Capcom to resurrect Dead Rising.
Akiyama finally gets his own spotlight game (sad that this feels as unlikely as the joke suggestions above ;( )
RGG Online gets a final story chapter which concludes Ichiban's story, and revels that the mysterios "X" is actually just Arakawa Masumi to no ones surprise.
All previous remasters and remakes get patches that improve performance on modern consoles, fix the weird issues with some mini games, and changes Kiwami 2's and 6's combat to that of the style switcher mod. I'll still find something to complain about.
And last but not least. Actual ports to the Switch...
Wonder if Gaiden is still going to hit this year
Like considering we are getting this event - RGGS tend to only start amping up the news on their next game when its fairly immenent to release. Another poster suggested this could potentially launch in September, Im thinking that could well happen.
But really its hard to predict. RGGS have no one specific period they use to release games, its been all over the shop over the years. Could be November for all I know! (though that feels too crowded for l'il ol' RGG)