Nothing, but sometimes, in movies like this, they can have some service to them to the building of the universe or to a sequel. I mean, heck, a scene with a bald head in a dark room looking at room full of monitors showing Superman saving the world with an ominous voice going, "So... he thinks can save the world, huh? We'll see about that." would've been awesome. It's just almost expected after the Marvel movies, I guess.