Here is a list of all the sequel movies coming out the next three years
Part 2's:
Batman: The Dark Knight - 2008
Silent Hill 2 - 2008
Sin City 2 - 2008
Part 3's:
Cabin Fever 2: Spring Fever - 2008
Ju-on: The Grudge 3 - 2008 (delayed, Japan)
Sin City 3 - 2008
The Mummy 3 - 2008
The Ring 3 - 2008
Part 4's:
Jurassic Park IV - 2008
Shrek 4 - 2010
Spider-Man 4 - 2009
Superman: Man of Steel - 2009
Terminator 4 - 2009
Part 2's:
Batman: The Dark Knight - 2008
Silent Hill 2 - 2008
Sin City 2 - 2008
Part 3's:
Cabin Fever 2: Spring Fever - 2008
Ju-on: The Grudge 3 - 2008 (delayed, Japan)
Sin City 3 - 2008
The Mummy 3 - 2008
The Ring 3 - 2008
Part 4's:
Jurassic Park IV - 2008
Shrek 4 - 2010
Spider-Man 4 - 2009
Superman: Man of Steel - 2009
Terminator 4 - 2009