tl;dr yes there will be another actual new coaster (no inside info just logic). But I mean Gringotts does use a coaster ride system so....
Long Explanation: Universal, for better or for worse, respond to guest feedback quickly and sharply. IOA was designed around feedback from guests wanting flat rides, water rides, and coasters. Guest approval ratings of Spider-Man and Transformers (USH and Singapore) got us Gringotts, Kong, F&F. And now guests rating things like Kong and VR lower leading to another wave of different styles of attractions. Guest feedback will create the demand for another Hulk/DC/RRR style coaster.