During the Disney Interactive event at D23 Expo 2015, it was announced that every Keyblade in Kingdom Hearts III will have its own transformation. The hosts made sure to emphasize that every single Keyblade is included in this. It was also re-confirmed at the event that attraction flow is able to be activated at any time. This was just mentioned in passing, so there's not much else to report here!
What kinds of other transformations do you want to see besides guns and canons, which we have seen already? Let us know in the comments!