The announcement of the SoP mentions two first party games: Stellar Blade and Rise of the Ronin. So we have confirmed that at least two of the more than 15 gaames will be 1st party. A week after the even there's another first party release, Helldivers 2. So very likely it will have a launch trailer there. There's also the Death Stranding 2 and Until Dawn rumors, which also are 1st party.
There are also other first party games announced to be released this year, like Concord, Lost Soul Aside or Convallaria. They may also show some non-2024 game like Marathon or Wolverine.
Pretty likely there will be PSVR2 (confirmed) and 3rd party exclusives (FFVIIR releases less than a month later) plus some indie and some 2024 multiplatform game with marketing deal.