I say they should be inducted in a couple of months au so. I also think their coronation should be maybe in Norway (not in EPCOT, but actually in Norway) and during the winter.
Post-haste, since it's pretty obvious they made them the way they did to cash in on Disney Princess merchandising. (Otherwise they would have made Anna a little girl like the original story and the Snow Queen the "beautiful, powerful, dangerous, cold" and aloof enigma that she was in the story.)
They're already merchandising the snot out of them, so I don't understand what's the hold-up?