>Well, I’m not Mary Jane unfortunately, but I am in the movie which is exciting. My character’s name is Michelle, if that’s what everybody wants to think. I’m gonna let people think whatever they want to think.

http://screenrant.com/spider-man-homecoming-zendaya-mary-jane-michelle/

So we can finally put this to rest, I guess. Note that she was never spotted with red-dyed hair in set photos.

The issue now is to figure out who the hell "Michelle" is. Fingers crossed for Black Cat.