Well... um I hope you don't hold it against me if I don't read that guy's stuff. My head will explode. O__O
My plan was to compared the 5th ed with the 3.5 monsters and extrapolate. :|
The second link is going to be helpful, though not a lot seems to have changed between the two. I imagine magic is what will throw the freaking monkey wrench in there.
EDIT: Glad they spoiled the red dragon. Because the dragons in Alabastra are living beings of the element and material planes. They're not broken along the metallic/chromatic lines. They come in four varieties each with families of colors. Breath weapons overlap sometimes, and most importantly they're smart enough to choose their own alignments, so you never know exactly how one is going to think based on its coloration. There body types can also be different if they're ancient, ancient. Earth are made of rocks, airs are made of solidified air.
Earth: Bronze, brown, tan, gold, etc. Breath: Acid, and molten lava, among one that's basically magical radiation.
Fire: Ruby, red, black, white, etc. Fire, molten lava, among others
Water: Blue, silver, white, gray. Water, ice, etc.
Air: White, silver, light blue, etc. Weapon Air (force basically), lightning, cold.