They used ideas from Snow White and Cinderella

‘Sleeping Beauty’ was created with discarded ideas from the other Disney films. They originally had the idea of Maleficent's capture of Prince Phillip and his dramatic escape from her fortress for ‘Snow White and the Seven Dwarfs’. Similarly, the fantasy sequence featured Princess Aurora and Prince Phillip dancing on a cloud was meant for ‘Cinderella’ but was dropped from the final cut.