Quoted from TigerLaw:
I’m not following you on this portion. How could Gunn, one way or the other, have had an impact on the Fox acquisition?
Anything controversial during an acquisition of this size is to be avoided. There were any number of things that could have upset the apple cart making it not happen. Disney moved with unusual speed to "jettison" Gunn when the news broke which leads some credence to the theory.
They wanted the Fox movie properties and wanted nothing to jeopardize that.