After seeing an Ender Dragon in action and noticing how cool and realistic it was, I thought of an idea (and yes, I know that red dragons are already a concept) what if there were red dragons with eggs and lairs. They would be less powerful than enderdragons but still destroy the blocks in their way, they would also be able to set things on fire with their breath (I mean, its not a dragon without fire-breathe). Now, they only spawn in rare dragon caves which would spawn in mountains near another idea of mine: NPC villager cities. They would have a lower spawn rate than villages, but would have more grand buildings, a castle in the middle, and some different textures for NPCs. I also think it should have NPC guards instead of iron golems, they have the strength of them, but appear more..... natural (I also think that if Jeb adds this, he might also want to modify villager UI). Now, back to the dragons. They would make random raids into the area around their lair, and that means the NPC City, so that would be the only con to living in one. Killing one would make it drop lots of gold and diamonds and lapis lazuli as well as XP. Their eggs are white and like ender dragon eggs, have no real use except as trophies. If this was in an update it would also add a new block: straw (could be used for crafting and other things)
Main world dragons and villager cities