Here's a list of upcoming movies based on videogames:
2008
Alice
Far Cry
Cold Fear
Driver
Fear Effect
Clock Tower
Brave New World: Ravaged Planet
Silent Hill 2
The Unforgettable
2009
Prince of Persia: Sands of Time
Castlevania
Tekken
The Suffering
Siren
Broken Sword: The Shadow of the Templars
Spy Hunter
Spyro The Dragon
Metal Gear Solid
Kane & Lynch
The Sims
Gears of War
Warcraft
Alone in the Dark 2
Area 51
Citizen Siege
Omnimusha
The Neverhood
2010
Max Payne
Mortal Kombat: Devastation
Joust
King of Fighters
Splinter Cell
City of Heroes
Devil May Cry
Ninja Gold
TBA
Assassin's Creed
Death Jr.
Doom 2
God of War
Return to Castle Wolfenstein
Stranglehold
Tomb Raider 3
Unknown Status
American McGee's Oz & Grimm
Crazy Taxi
Darkwatch: Curse of the West
Diablo
Duke Nukem: The Movie
Eternal Darkness: Sanity's Requiem
Fatal Frame
Fear & Respect
The Getaway
Half-Life
Halo
Hunter: The Reckoning
MechWarrior
Metroid
Nightmare Creatures
Pac-Man
Perfect Dark
Psi-Ops
Quake
Resident Evil IV
Vampire: The Requiem
Sources: Wikipedia and IMDB