"A Roaring Success and Its Effects on Broadway: 'Lion King' Changed Everything, and the Stampede Isn't Over," By Nelson Pressley, Washington Post Sunday, June 29, 2008; M03.
To be honest, when these adaptations started they seemed like a really, really dumb idea. Why try to bring something to an earthbound stage when you've got unlimited imagination in animation? Not having seen one yet, I'm still unsure. But comic strips have been adapted to the stage and screen since forever (or the 1890s) so why should animation be any different?