Sequel Mania

Its said that in the bad economy, Publishers are betting on existing licenses. This means, lots of sequels, and very little risk taking. But is it really true? Is L4D2 too soon? Judge for yourself based on the list below. List is based on date written, not to be updated.
* = brought out of retirement

Supreme Commander 2
Overlord 2
Bioshock 2
Battlefield 1943 (2)
BF- Bad company 2
BF 2
Dead Rising 2
* Starcraft 2
Mafia 2
Left 4 Dead 2
Prey 2
Divinity 2
Lego: Indiana Jones 2
Ultimate Alliance 2
Operation Flashpoint: PR (2)
Crysis 2
Call of Jaraz:BiB (2)
Two Worlds: Temptation (2)
CoD: Modern Warfare 2
Assassins Creed 2
Dirt 2
Diablo 3
Red Faction:Guerrilla (3)
Painkiller: Resurrection (3)
* Tropico 3
Disciples 3
STALKER: Call of Pripyat (3)
* 7th Guest 3
American Army 3
* Max Payne 3
* Deus Ex 3
* Thief 4
Doom 4
Ghost Recon 4
Resident Evil 5
Splinter Cell: Conviction (5)
* Monkey Island:Tales (5)

re imagined or never ending...
Ghostbusters
Wolfenstein
Alien Vs Predator
NFS: Shift
Tiger Woods Online