Mickey, Donald and Goofy play as the shoto, rushdown and mixup respectively
Minnie Mouse plays entirely differently than Mickey, being a beastmaster who summons singing farm animals
The Headless Horseman is the only mount; second place wpuld have went to Alice and Julius from those early
Alice Comedies shorts (they would have rode a parade elephant)
Mufasa would be portrayed in his ghost form; it cheapens his impact a tad but its also very funny
Esmerelda would fight through her dances, Alan through his instrumental prowess; if it wasnt obvious, a lot of characters were chosen over their main character contemporaries for the sake of a diverse roster
"President Pooh" takes inspiration from
this marketing scheme Disney pulled in the 70s to promote the Pooh shorts.
In terms of the acquired properties? Woody and Buzz are the sole Pixar reps to keep the roster relatively small, while the rest are relatively shill picks to promote these facets of the company