The truck driver tells us to trust him (apparently, this was enough for us to believe that he wasn't a serial killer) and opens up the back of the truck. And of course, anytime the back of a truck opens, you're obliged to look in. Sure enough, costumes. An abundance of them, along with heels I made sure to take note of and purchase later on.
Disney Princesses are the WORST role model for your son to have. Here's my advice. Tell your son it's okay to be a princess for now. But one day, if he wants to rule, he'll need to step up and become a queen. And being regal means NOT getting co-opted into the princess-industrial complex.