The first film in a series is exciting and new. The possibilities are endless. By the time the third or fourth movies comes around, it takes a greater mind to invent news ways of moving the narrative along.
The fourth movie in the the Shrek series is Shrek Forever After. After the events of Shrek (2001), Shrek 2 (2004) and Shrek the Third (2007), Shrek (Mike Myers) and Fiona (Cameron Diaz) are dealing with the challenges of marriage and parenthood. Unable to deal with the stress of it all, he wishes that he was a real ogre. Rumpelstiltskin (Walter Dohrn) grants his wish. At first, he is content with his new life.
Then Shrek realizes that he has been setup. Before he can stop Rumpelstiltskin, he has to first convince Fiona, Donkey (Eddie Murphy), and Puss in Boots (Antonio Banderas), who do not know him, to fight against their common enemy.
To say that the creators stretched whatever narrative ideas they had is an understatement. They get an A for effort, but little else.
Do I recommend it? Not really.