I have seen it in my dreams dragon definitely has wind logia the wind storm on loguetown that green wind gust is no normal storm. It was created by Wind logia. Dragon also blew a wind gust on grey terminal to create a way to survivors from fire. Baltigo is windy and dragon always seem to be surrounded by wind. Also wind symbolizes the freedom of movement and freedom in general which is the goal of revs. Also when dragon was holding kid sabo in goa kingdom there was wind was blowing. Dragon has eaten Kaze Kaze no mi and thus became wind human
It is the most likely power for him. I don't think anyone actually wants you to be wrong.