Here is a list of all the follow-up movies made after success of the original movies, but they just ended up making a bad name for the brand!.
Superman IV: The Quest for Peace (1987) and Superman Returns (2006)
The special effects remained the same in any Superman movie, though the absurd plot and story line of Superman IV (where he single-handedly avoids a nuclear war) proved disastrous. The sequel that was made in 2006 though had good production but none of the whimsy was to be found.
Pirates of the Caribbean: On Stranger Tides (2011)
Johnny Depp’s comical but accurate timing injected life into the movie Black Pearl released on 2003, the first film of the series. Though the ratings dropped after that but still, it had enough points so that the viewers were gripped. Part 4 of the movie series bored the audience with its stellar cast and park rides.
Saw III, IV, V …… till eternity (2006, 2007, 2008)
The first Saw movie was widely regarded as original, disturbing and purely a indie horror movie. But the subsequent releases saw a decline in plots and originality with the same amount of disturbance in it.
Rocky V (1990)
Rocky Balboa in 2006 was a pretty decent and entertaining movie. But if you see Rock 5 you would feel the series has been wasted; Rocky grows old and is forced to return to the ring as he had lost all money. The hero grows pathetic and old.
Ocean’s Twelve (2004) and Thirteen (2007)
The remake of the Rat Pack movie by Steven Soderbergh in 2001 was entertaining enough though not brilliant. Its successors were however not.
Indiana Jones and the Kingdom of the Crystal Skull (2008)
The super hit movie franchise by Steven Spielberg featured an active and young Harrison Ford and adventure stories. But the recent movie after nearly two decades have an old Ford playing the character again in a reshaped plot.
Blair Witch 2: Book of Shadows (2000)
The Blair Witch Project was a massive hit due to its plot and premise. The successor though had the same plot of kids going to the woods and never returning back but lacked the viral campaign or the handheld cinematography.
Jurassic Park III (2001)
Again Spielberg did make an excellent film which is purely original. But Joe Johnston’s sequel of the film was a disaster and incidentally it was not based on the popular Crichton novel.
Batman Forever(1995) and Batman & Robin (1997)
After Batman Returns (1992) and before Batman Begins (2005) was the so called dark period in Batman series. It was also called the late ‘90s.
Matrix: Reloaded and Revolutions (both 2003)
The Matrix movie had us with its special effects and a message that was provocative enough. The sequels put a full stop to that.
The Godfather: Part III (1990)
The second movie in the trilogy was one of the best sequels of all times but the third one was a disaster. Maybe they should not have done the third one.