It looks like that Maggeena has now become the new leader of The Bart Allegiance for a certain comeback mission to rescue Bartman.
This pic is very loosely based on my Fan Fic: Bartman - The Return of Maggeena, a sequel to Simpsons Fantasy of sorts: [link]
Bart Simpson as Bartman
Lisa Simpson as Lisa the Conjurer
Maggie Simpson as Maggeena