Grass-Type Gym Leader
I agree that Koraidon will be dragon fire, but I'm thinking that Miraidon will actually be steel dragon, and we'll just be getting two dragon types. I have used past pokemon designs to look towards the future of pokemon and their typings! (See what I did there?)Kind of wishing Miraidon would be a new type of pokemon called like tech or something but sadly, I think he will just be a steel type. My guess is Koraidon will be fire dragon type, and Miraidon will be a steel electric type.