Went to my Gamestop today after class, he said I wasn't even the first guy to come in asking about it. TL;DR they haven't heard word on it personally, he assumes it'll be on the receipt but can't know for certain until tomorrow.
I did bite the bullet, ordered Gold via Amazon (will do Silver tomorrow), I can confirm that we get the Cast Theme right away. I really wish Nintendo was more transparent about shit like this, I nearly had a panic attack seeing this thread this morning and finding 0 news elsewhere on the web. Can't wait to play the games at least, cheers!