We've seen the pictures and the videos and we've gotten hyped and that's great... But I believe that Aang can save-- sorry. I believe these dragons are chicken scratch to what's really waiting for us, and that is a dragon boss in the Vault of Glass.
It makes sense, based on dragon lore: A massive dragon is asleep deep in a dark, dank dungeon, and heroes come through hell to get to it, in order to steal its even more massive hoard of loot.
I think all these other dragons are merely loosely dispersed babies or descendants, and we probably won't fight them. They simply serve as a reminder that there's something crazy around the corner on 9/9....
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As much as I wanna see dragons more often than just the end of the game content but if this was actually how it'll work and we'll just see like dragons flying around but not actually fight or get up close except during vault of glass or another raid I would not care at all that would be such an awesome way to hint.