This is a long shot but I think there's a small chance of Uncharted being shown. Even if it's just an Uncharted 4 remaster. In the music to the event reveal viideo they subtly use the "Where is my mind" music . That's the same song they used in a TV spot for Uncharted 4.
i fully expect that sony's main AAA titles will get some next gen polish. uncharted, GoW, TLoU2, GoT, Horizon at least. i personally think the only reason sony isn't talking about it is they want the mass market to be thinking about all the new games sony is bringing and not BC. BC is cool and all, i don't want to diminish the feature,.. but at the same time new titles is what will drive sales.