The character infusion at EPCOT began years ago, long before Frozen Ever After overtook Maelstrom and the Three Cabarellos axed El Rio del Tiempo. Some additions were more subtle, like the DuckTales World Showcase Adventure, an interactive eye spy game that took younger visitors and their families into several pavilions to hunt for clues and solve a mystery. The attraction poster was a nice touch to advertise something unique, rather fun, and an introduction to the park's future.
(Concept art copyright The Walt Disney Company.)