https://www.techradar.com/news/sonys-e3-2018-is-starting-early-with-ps4-and-playstation-vr-game-reveals

Sony is kicking off the E3 2018 party early as it plans to reveal a new game every day leading up to its big June 11 event. 

Apparently Sony has so many PlayStation updates to share on Monday, it's taking the spill over into this week.