Got to agree with UC.
When I think of Disney, I think of Mikey and the gang.
Also, I think, no matter how hard the tries, it would ruin the magic and aura so to speak that surrounds him. I think it would only serve to drag his name throught the ground and ruin the legend and magic of him. I know what I am saying is cheesy and that, but it's how I see it and I don't think I could get my point across properly any other way.
Kids would not be interested, and would not know who he was. Older people would know, but kids who meet the characters would not know him and would not want a picture. To them characters are real and if I was 6 I'd want a picture with Buzz more than a man I didn't know. In that respect a Walt character would be pointless.
So nay, I would be sad to see him as a character, I'm afraid it would do more harm than good, and upset, offend and disturb people.