Square: Already announced FF games so come out in the first half. Square will have few surprises, DQMJ4 and a new SaGa game. From Eidos front, a port of Deus Ex Mankind Divided. No Tomb Raider. DQ11 will skip 2019' DQB2 will release in West late 2019. No KH either.
Capcom: Lots of retro shit. RE GameCube gabes are already coming, but they'll also announce RE2 Remake for Switch too. Another surprise is Ace Attorney 6, though it won't be from series creator Shu Takumi. They'll also bring other Onimusha games and a port of Dragons Dogma. No Monster Hunter despite the MHW2 announcement for other consoles. MH seems to be fine with Nintendo.
Namco: Ports of One Piece World Seeker, Jump Force and that Black Clover game. Brave new Tales will be announced for PS4 and Switch for 2020. Namco's other new titles are: Successor to Digimon Story Cyber Sleuth, a new Boruto game, and SAO Alicization. All for 2019 fall. No Soul Calibur.
Konami: Nothing.
Sega: I doubt they'll announce anything else, I expect Sonic Racing to be their only game. Maybe Sonic Movie tie-in? I don't expect it, but I want a Dreamcast collection.
Koei-Tecmo: Lots of things but no one will care. More Musou ports of Vita games and a new Atelier game. No Ninja Gaiden, no Dead or Alive, no Nioh.
Atlus: SMT5! Full Switch exclusive and get crazy scores from gaming press. Will have online multiplayer, similar to Pokémon. Another surprise is 13 Sentinels. No Persona 5.
Bethesda: Doom Eternal is a 2020 game. But Bethesda will keep us busy with Prey and Fallout 4 ports.
2K: Here comes the biggest Switch supporter of 2019. First they'll bring XCOM 2. Than it's the game everyone's waiting for: GTA5. Not only that, 2K also brings PS2 era GTA games. Next, Borderlands collection for fall, all three games, but that's not all. Borderlands 3 is also coming, much thanks to Panic Button. WWE returns to Switch in 2019, with limited Impact Edition.
THQ Nordic: Nothing shocking. Except The Timesplitters Collection! After Saints Row The Third, forth game is also Switch bound. They'll actually bring their most of their Ps3 era library, including Kingdom of Alamur.
Activision: Crash Tag Team Racing will be their only game. No Spyro. No Call of Duty.
Ubisoft: Least predictable of them all. Is that Assassin's Creed collection really coming? If it is, I also expect a Far Cry collection too. That's it. They're too focused on next gen. Maybe at E3 will see the sequel of Mario and Rabbids.
EA: Fifa.