Part 4 deals with all the events that occurred after the storyline Revelations. Many events that made things clearer and explanations for the entire saga were revealed in issues after the clone saga. Even to this day, the clone saga is referred to and more and more concerning the entire era is added to. 

Key:

ASM = Amazing Spider-Man
SPEC = Spectacular Spider-Man
WOS = Web Of Spider-Man
SPID = Spider-Man
SEN = Sensational Spider-Man

In an alternate reality story, the question is asked: What if the Scarlet Spider killed Spider-Man?

A number of alternate endings to the clone saga done in a humorous vein. 

Many secrets revealed through the Journal of Norman Osborn...Many revelations including the how's and when's concerning his apparent death in Amazing Spider-Man #122 and what he did in between that time and his return in Spider-Man #75...Also his connections to the Scriers, Judas Traveller, Seward Trainer, the Jackal, Mendell Stromm/ Gaunt. More detail is given on his whole plot against Peter Parker and Spider-Man.

A very suggested read for anyone interested in the Clone Saga.

A Third Carrion, Dr. William Allen is introduced and the first Carrion introduced in Spectacular Spider-Man #25 is revealed to be a clone of Professor Miles Warren by the High Evolutionary.

Mendell Stromm, better known as Gaunt in the clone saga, is found to be alive and well. He was last seen seemingly killed by Norman Osborn at a school yard after failing to kill Ben and Spider-Man. He received brain damage from Osborn's blasts and thus created memory loss. Osborn's name "triggered" back his memory and then went after Spider-Man with a vengeance. He was taken to Ravencroft Hospital after Spider-Man defeated him and hasn't been seen since.

Kaine makes a short appearance as he and many other super villains are set free from the super-human prison called the Vault...He and the other villains are soon returned the prison.

Kaine makes an unexpected appearance as he battles a number of Scriers and leaves at least one in a hospital with the "Mark of Kaine".

Mendel Stromm comes back, partially in the form of a computer system trying to take over the world. He asks Spider-Man to kill him and that of course is against Spider-Man's beliefs. Instead, Spider-Man uploaded a loop program putting Stromm in Standby mode where he is now in an eternal sleep.