That's just wrong!

I have two small children - the oldest is 4 and he's a superhero freak at this age! He loves all of them - Batman, Spiderman and especially Superman. Well, of course the new Superman movie is out, but it's PG-13 and yet they're marketing it during Dora the Explorer and SpongeBob in the mornings when small children are watching. Well, guess who the bad guy is?...dad and me! We won't take him to the movie because it's not small children appropriate, but I can't explain that sufficiently to a 4 year old to make him understand. He just knows that Superman is at the movie theatre and I'm not taking him. I took him to Cars...why can't I take him to Superman? It's not good enough that Cars was rated G and Superman isn't...he doesn't get that. They should market to the correct demographic and not little children that shouldn't see the movie...that's just wrong!