It appears Elixor, the Community Team Leader of the official PlayStation European boards, has already posted what content is likely to be included in this Thursday's PSN (EU) update. To quote:

Games
[9.99€] 1942 Joint Strike

Demos
[Gratuit] Elefunk
[Gratuit] Play TV (France uniquement)
[Gratuit] 1942: Joint Strike
[Gratuit] FIFA 09

Add-ons
[4.99€] Pain - Amusement Park
[0.99€] Pain - Personnage Kenneth
[0.99€] Pain - Personnage Yeony
[0.99€] Pain - Personnage Tati

[1.49€] Rockband - Pack 1 Title
[3.99€] Rockband - Pack 3 Titles

[7.99€] Rockband - Pack 6 Titles
[10.99€] Rockband - Pack 9 Titles
[14.99€] Rockband - Pack 12 Titles

Videos
[Gratuit] FIFA 09 - Trailer

[Gratuit] Tomb Raider Underworld - Trailer

[Gratuit] E3 2008 - Mirror's Edge - Presentation
[Gratuit] E3 2008 - Pure - Trailer

Desktop Backgrounds
[Gratuit] The Last Guy - Wallpaper A

[Gratuit] The Last Guy - Wallpaper B

[Gratuit] The Last Guy - Wallpaper C

[Gratuit] The Last Guy - Wallpaper D

[Gratuit] The Last Guy - Wallpaper E
[Gratuit] The Last Guy - Wallpaper F

Themes
[Gratuit] PixelJunk Eden - Theme Red
[Gratuit] PixelJunk Eden - Theme Black

Reminder: This list is temporary and can change here Thursday. If you want to use this information on your site or blog to thank you specify. More PlayStation 3 News...