If the club sees Zizou as a legend, I dont see how there can be any debate about it.
- - - Updated - - -
How many United players have won the balon dor while playing there? Not many I guess. 3 EPLs, 2 CL finals, of which he won one, and playing a big part in what United is now in terms of marketing. His on and off field contributions easily put him as one of their greatest players ever, so he should be a legend, regardless of what happened afterwards