According to Cuphead co-creator Maja Moldenhauer, the original Cuphead game still had undiscovered Easter eggs.
IGN interviewed Moldenhauer at Summer Game Fest Play Days, an event at which the game’s long-awaited DLC, The Delicious Last Course, became available to play. Another game that was also present at the event was 6 . street fighter.
During the interview, Moldenhauer spontaneously asked if we had a chance to play Street Fighter 6. For some, Moldenhauer’s interest may come as no surprise: One of Cuphead’s boss fights is known for its involvement in the Street Fighter series.