The Revolutionaries’ base was attacked by the Blackbeard Pirates, who destroyed the base before the Marines and Cipher Pol arrived. The fate of Dragon and the other Revolutionaries was not mentioned in the newspaper detailing the battle, leaving their current status unknown. Were they defeated? Well, it is highly unlikely that the Revos were utterly defeated, and their base totally annihilated, otherwise all of Dragon and the Revo’s hype would be gone to waste.
Here is my speculation: Dragon noticed Jesus’s presence, because if he’s really a Wind/Air logia, he would be able to detect the small fluctuation of air in Baltigo, the same as Enel when he can hear voices using electromagnetical waves, or Crocodile who can detect underground rivers with his DF. I think that Dragon successfully summoned all of the Revo Leaders and came up with a plan to crush the World Government.
The Reverie is a good opportunity for the Revos to shine, as they have (especially Dragon) done nothing since the beginning of the manga. Oda wanted One Piece to last 5 years so if he introduced Dragon so early in the series, it’s definitively because he had something to do.
My perfect scenario is that the Revos vanished entirely from Baltigo, taking with them Burgress as an hostage. Blackbeard arrives and realizes there is nothing left, by rage he destroys the island using Black Hole, which is his only island-level destruction technique. Much later, during the Reverie, the kings discuss affairs when suddenly Dragon appear just in front of them, using his Wind powers, and unleash a large scale battle in Mariejois. It would be the perfect opportunity to present the Revos as a real organization, alongside with the Marines and the Yonkos, and hype Monkey D. Dragon.
*Theory by Endomorphisme
