I was wondering if I could have some ideas or cool adventures for a campaign with Dragon Player Characters.

I have already ironed out the mechanics I'll be using, so this it's just story hooks, plotlines, etc. that I'll be looking for.

The general lore of the campaign is that all the Dragons have been hunted down and killed. Any survivors have retreated into other planes, deep within the sea or underdark, or other far away lands. The Dragons have left clutches of eggs scattered throughout the land, hoping that one day their descendants will rise up and reclaim the glory they once had.

So far I was thinking of them starting in a cave system, having been raised by Kobolds. There has been an earthquake and the way outside has been cut off, so they have to venture through the unexplored sections of the underground to find a way to the surface.

Any other cool adventures a group of young Dragons can go on?

A lone warrior has learned to shout in the Draconic tongue, and now seeks to absorb dragon souls to  power his magic.  Claims to be The Dragon Born.  Has multiple houses, usually one in each major city and a few in the wilderness.....

There was an old setting called Council of Wyrms. You might track down a copy. I don’t think it’s been updated to 5e, but it may have ideas for you.

Thanks! I'll be sure to look for that.