Not gonna lie I just cant see Oda introduce some other random character who has the actual ability Dragon has been implied to have all this time. It instead being that Dragon can just passively/actively influence the weather even in his now transformed form makes way more sense. It would be one thing if he had a suspiciously secret right-hand man but we know his "main" guys in the Revos by now.
All Revos we know already have devil fruits that do not affect weather or wind. And Dragon needs his own kind of hype. The time of even speculating if he is a fight or not is over. Luffy NEEDS his pops, Top Tier in his prime, to fight against the Gorosei and Imu, lets be real.
Not a Right-Hand Man
More like his Superior or He secretly have Uranus
Only thing We can Confirm about Dragon's Fighting Style is that He is Ryusoken Master, Garp's Son & CoC User
So He can deliver some really Powerful Haoshoku-Imbued Martial Art Attacks, which makes him comparable to Garp in Combat
And then comes the Source of those Winds which represents his Trump Card
And i told you about Chapter 100, do you have any Explanation why Dragon wasn't the Source of those Winds?
We've never ever seen something like that except when it's something else Attacking like Big Mom's Homies
Dragon didn't Transform, didn't move his Hands, the Winds didn't come out from him, nor even from where He was standing, Anime removed "Wind Blast" Line, so We can't confirm if it was his VO who said it ... etc
Celestial Dragon's Mark is Dragon Hoof (Western)
But They aren't Dragons themselves, it's more like They worship them
Dragon also have his Mark/Tattoo (Eastern)
So it's possible that He is also not a Dragon, but instead He worships an Eastern Dragon (Source of those Winds/Storms)
Oda hinted at People who worship an Eastern Dragon/Serpent in many Arcs, it's almost confirmed that long ago existed an Eastern Dragon/Serpent who was Worshipped by Most