Thanks to data mining, we know that there were element-based Keyblades in Missing Link. Take a look at the Keyblade in 4, you'll see that it has elements of Missing Link's Keyblade structures -- I think the build system allows you to combine Keyblades for new "builds"
Cable Town
A Moana Keyblade that doesn't have any Moana iconography on it? I DOUBT IT.
