>>28374218Most Megas are fairly small changes. Enough that you can still recognize the Pokemon the came from, and generally less of a change than actual evolution. Mega Gengar and Heracross are the only major exception to that rule.
I think the major change would be to make him a bit sleeker, and then replace the barbed wheel with a gyroscope based on pic related, to further cement the divine theme while still staying mostly in tune with the original design.