Per my post from this AM, there is still no projected date when Maleficent will join Fantasmic but I want to at least give you and idea what it will be like.
JOINING THE CAST AT DISNEYLAND A spectacular new fire-breathing dragon takes center stage in Fantasmic! the long-running spectacular presented on the Rivers of America in New Orleans Square and Frontierland in Disneyland. Fantasmic! combines Disney characters, live performers and amazing special effects with high-definition digital images from classic Disney movies, projected on giant mist screens. The dragon, inspired by Sleeping Beauty, stretches as high as 45 feet tall, is capable of a wide range of movement and breathes a 35-foot-long plume of fire that ignites the Rivers of America.