Just something random I noticed. I was looking for some reference pictures of the Dragon gods, and I noticed that some of the Dragons are wingless when you first encounter them, but later, in the video of the creation of the Dragon God, they have sprouted wings.
The earth dragon is completely wingless the first time and the green dragon has some sort of branches where the wings are supposed to go.
Technically, the red dragon is wingless too the first time you meet him, he grows wings at the middle of the battle.
The black, sky and water dragons don't change their appearance at all during the course of the game.
But the water dragon is wingless too, he has something that looks like small fins in his back, instead of wings, but he never grows proper wings (and still he can fly
).
Not sure any of these are of any relevance to the game, but I find it really curious. I wonder if the wings of the earth and green dragons got in the way during the battle animations or were too distracting and that's why they were dropped?