Unlike with Microsoft and Ubisoft's press conferences, it seems like Sony's won't be leaked early online (either in terms of surprises or game list order) at least by the people who leaked the earlier ones.
The one who leaked Ubisoft's lineup is claiming he won't because of respect and/or not wanting to spoil stuff for others. Didn't have a problem with earlier press conferences but did imply Sony is the only conference he actually cares about today.
One game though did get leaked so far for Sony's press conference later tonight from Reddit so probably the best to avoid that site till the event for those that don't want to be spoiled.
Red Dead Redemption 2's debut