User blog comment:Matt Hadick/Jurassic Park 4 Plot Revealed? (SPOILERS)/@comment-2221163-20130622004023/@comment-6493791-20130622152056

BastionMonk is right on that; Wu proposed version 4.4 to John Hammond, which, in practice, involved further genetic tampering with the animals to make them slower, tamer, and easier to contain. Although Hammond in the novel quickly dismissed this, there's a good chance Hammond is dead in the fourth adaptation, opening new possibilities for Genetically-altered dinosaurs.