Dumb parent worries: Will my kid get spooked by PG-13 trailers like After Earth in front of PG-rated movies like Oz?

I made an offhand joke a couple days ago about all of the big summer release trailers being dropped online and presumably into theater this week.  I'm taking my daughter to see Oz: The Great and Powerful tonight and I'm curious to see which trailers are attached to PG-rated Disney family adventure.  Obviously The Hangover part III is probably not going to make an appearance.  But what about the more mainstream PG-13 entertainments like Iron Man 3 or After Earth?  So will the first 15-20 minutes or so of my daughter's moviegoing experience consist of a series of trailers for big summer releases that she can't see?  Will I have to explain that "No, sweetie, *this* Iron Man movie is for adults."  I've had to do that before, like when when she spotted the DVD of Snow White and the Huntsman at Best Buy, and I always feel like an idiot when doing so.  The other thought that comes to mind is a 12 year old news story, one which I gave little thought to at the time.