IF they dont change the trains, then IMO its not really a retheme. They will probably just change the internal queue and the themeing in the castle. Its already pretty much ready for this change without much...
But if they change makes DD look stupid, childish and cheezy. I would be tempted to just not go to IOA.
Maybe its a good thing Im choosing Sea World Orlando and Busch Gardens Africa over IOA and USF. I think Id be more disappointed. At least I get new rides at both parks since my last visit to BGA and Ive never been to SWO so theres 2 more credits.
This better not turn one of the best ride experiences into a watered-down "family thrill ride"...DD is one of the most famous Inverts. If it ain't broke don't fix it.
I guess but isn't it kinda already themed to Harry Potter? Castle...Dragons...things like that just no characters...I think it's a decent fit already without a retheme.