I guess he'd look something like this? Here's Hong Kong cosplayer LenLENko swinging by a local McDonald's in her Hatsune Miku inspired Ronald McDonald get-up.
Outfits like this that rework or reimagine established characters are among my favorite. LenLENko pulls this one off brilliantly. Extra points for actually going to McDonalds and getting a meal in costume.
You can see more of LenLENko's work on her Facebook page. Or maybe at a McDonald's in Hong Kong.