Yeah but Dragon Knights aren't mentioned in DD and yet Divinity 2 and Dragon Commander are stating that they were around back then and long before. FoV also stated that Bellegar was around long before Divine Divinity and Original Sin (back during the chaos war) so it wouldn't be lore breaking to have him pop up in Original Sin considering it's established he has been around for a long time (and in his own words, saved humanity once before from the Apocalypse).
