They're not going to buy either. The hypothetical is null to begin with. All I am saying is that Disney is not EA and tosses the companies it acquires into the rubbish bin.
You forgot about LucasArts.
Of the two, only Nintendo holds a monopoly in anything (handheld consoles).
I'm not sure how Disney can be remotely accused of being a monopoly. Every sector they they own a stake in has competition from multi-billion dollar companies. The problem with the entertainment industry isn't Disney. It's that the box office is falling in general and the other studios are being critically mismanaged.
Disney is a monopoly because they're buying out major companies left and right; Marvel, LucasFilm, 20th Century Fox, etc. If they keep it up it'd severely damage the entertainment industry and several others.