Jurassic Shark II
At the end of the film, Simon leaves Marcus a message with his phone. Simon orders him to withdraw the other employees from the walking trail, as they were ready to finish off Chase Landon and the rest of the Shark Hunters. Simon claimed that they have weakened their enemies' forces, and they need to restrengthen their forces. Yet Simon also said that once this rebuilding is complete, then the revolution will begin. He then ends the message and runs into the woods.
Jurassic Shark III
Marcus will appear in the third film as a corrupt InGen employee allied with Simon.