Original concept sketch by Designer Andy Engel:

'Simba' Illustration process and additional completed characters (pre composition). Character drawing and vector linework by Andy Engel:

Additional characters illustrated in the same manner as shown above. Most elements are illustrated 'Full Figure' even if not shown on the composed key art, for additional marketing uses:

Background composed & retouched from multiple Studio archive images, used in original Lion King Theatrical Release and other promotional materials. Original Scenic Painting- Sky, Simba Cloud, Landscape, Animals- John Alvin. Digital composition & retouch: Eric Heintz. 

Original Scenic Painting elements by Legendary Disney Artist John Alvin: