The scans demonstrate a new feature: the player item shop. Using "wireless communication" of some sort (probably local, but we hope not!), players will be able to operate their own item shops. You can choose your inventory, rename the items, and then set prices.
It sounds a lot like the shop system in Castlevania: Portrait of Ruin, which did use the Nintendo Wi-Fi Connection. So there is some hope that we'll be gouging strangers.