According to the Los Angeles Times, Disney will debut a new character meet and greet based on the characters from the forthcoming The Princess and The Frog.
What makes this unique is that the procession of musicians and performaers will start in New Orleans Square (at Disneyland) and Frontierland (at WDW) and then heads to the riverboat! Pre-selected guests will then be able to pose on board the riverboat with Princess Tiana et al. for pictures and autographs. The riverboat will also stop several times a day on the riverfront where the characters will perform songs from the film.
The event is scheduled to start on October 26 at Walt Disney World and November 6 at Disneyland.