Grounded in reality = Boring serious business and a term 20 somethin' year old kids love these days
Don't even say reality anything, just ****ing say, "we're making a new Superman movie where the hero is grappling with what it means to be "good" in a world that is reacting to his superhuman existence".
That's basically what the movie is about. Nothing more. It'll be as "grounded" as any other Superman before it. Cept' maybe that one with Richard Pryor or the Nuclear Man. That was weird ****.
There ain't gonna be no grounded anything since we don't live in a world where dudes fly around shooting laser beams out of their frickin' eyes and smash into the ground fist first without a scratch.
Sure, they might try to obnoxiously explain every reason until our ears bleed from all the exposition, but what does that mean? A movie is a movie. Enjoy it and have fun, it's SUPERMAN. Lighten up.