So, they would put Maui as a fully active audioanimatronic in the center of the room (probably still with a projected face) and have a projected faced AA of Moana in a static mode (like Elsa/Anna/etc. from Frozen Ever After) somewhere along with a HeiHei AA...
I can see it now. (Pardon my spelling of the characters)
Maui did something to upset the goddess Tefiti (stole the heart) Then the volcanoes erupt (this would still be the exact same effect from the windows used from the old Tiki Room show). Maui would pop out of the middle column..thingy with the glowing heart in hand. Then Moana would appear and talk him into giving it back to Tefiti/Teka before she gets really mad. Maui gives it back. All the birds/creatures/whatever they add sing happily that Tefiti is back. The end.
Boom.