Originally posted by CatL18My take:
BTW, in Morrison and Geoff's setting, it is Superman who represents ink(imagination)
But, in Snyder setting, it is probably The Source who represents ink.
What do you think this difference?
The Overvoid is the blank paper/canvas of the comic book itself -- the 'white space' in between panels. I believe the Source is a type of proxy/variation of the Overvoid(as they both transcend ALL), and is used as the means through which writers can introduce the ink/content to the page.
Thought-Robot was powered by the most powerful and hopeful story in existence: the story of Superman. That was the only way to counter Mandrakk, who was, literally, the epitome/manifestation of 'bad story' -- the metafictional essence of evil, if you will.