I just saw a video and the guy said that Notch said he might make red dragons. They would be the size of the ender dragon and be red. The ender dragon would then get bigger and stronger. You would be able to tame the red dragon and ride it. Also make it able to breath fire but not break blocks.A idea I have is having giant caves for the dragons lair. Wouldn't that just be awesome? If you like this idea support it and ask mojang to add it!