Johnny Depp as Tonto: When sidekicks become central

Johnny Depp, whose Tonto might outshine Kemo Sabe

Now that the stalled Lone Ranger film starring Johnny Depp as Tonto and and Armie Hammer as the masked man is back on track, it amounts to a trendlet: Revisionist movies in which the minority sidekick of yore gets upgraded to central figure.

Earlier this year, Michel Gondry's The Green Hornet had Seth Rogen as a dim Britt Reid upstaged by bright light Kato (Jay Chou). Which other classic stories might profit from making the sidekick the central character?