DreamWorks Animation CEO Jeffrey Katzenberg has hinted that a fifth “Shrek” movie may be coming, four years after “Shrek Forever After” was released, Variety said.

“We like to let them have a little bit of time to rest,” he told Fox Business Network in an interview scheduled to air Tuesday, Feb 25. “But I think you can be confident that we’ll have another chapter in the Shrek series. We’re not finished, and more importantly, neither is he.” The four “Shrek” films grossed $2.9 billion worldwide.

DreamWorks Animation announced Monday that it was teaming up with Merlin Entertainments to launch a “Shrek” themed visitor attraction, to be called Shrek’s Far Far Away Adventure, in London.

The attraction, which will open in the summer of 2015, will take visitors through a live interactive adventure featuring Shrek, Fiona, Donkey, Puss in Boots and other characters from the franchise. It will be the first of six “Shrek” attractions to be rolled out over nine years.