According to Screenrant Cujo will be making an appearance in the new Dark Tower film starring Hollywood A-listers Idris Elba and Matthew McConaughey. Specifically, Stephen King said the following:
“If viewers who are familiar with my work look very closely, they might see Cujo. Keep an eye out for Cujo in New York City.”
This backs up theories that the carnival rides seen the first Dark Tower trailer might be connected to It. Are we to expect a Stephen King Universe if this film is successful?