This is exactly what we've been discussing as a solution to the dlc uproar until things die down. If two of the same hex codes meet, I'm pretty sure the conclusion was that you would see whichever item you have in your game already. What we've concluded from this, is that if we release any new items in the same hex codes as the old hdlc, then wiibrew users can switch them out as they please and non-wiibrew users will not have to risk losing any more of their oh so precious emptry slots.