Benben said:
From 2nd and 1st ed what dragons haven't we seen yet?
I can't answer that question, but I can post a not-quite-exhaustive-but-still-pretty-impressive list of dragons from various 2nd Edition sources. What are the odds of all of these being covered in the Draconomicon?
Dragon, Adamantite (MC8)
Dragon, Air (SJR2)
Dragon, Amethyst (MM, MC14)
Dragon, Amphi (MC4)
Dragon, Astral (MC4)
Dragon, Black (MM, MC1)
Dragon, Blue (MM, MC1)
Dragon, Brass (MM, MC1)
Dragon, Brine (MCA2)
Dragon, Bronze (MM, MC1)
Dragon, Brown (MM, MCM)
Dragon, Chiang Lung (MC3)
Dragon, Cloud (MM, MC5)
Dragon, Copper (MM, MC1)
Dragon, Corpse Tearer (D#183, MCA1)
Dragon, Crystal (MM, MC14)
Dragon, Crystalline (MCM)
Dragon, Deep (MM, MC11, FOR2)
Dragon, Dread (D#182, MCA1)
Dragon, Dzalmaus (D#163)
Dragon, Electrum (MCA1)
Dragon, Emerald (MM, MC14)
Dragon, Faerie (MM, MC3)
Dragon, Fang (MCA1
Dragon, Flame (D#183, MCA1)
Dragon, Forest (D#182, MCA1)
Dragon, Frost (D#182, MCA1)
Dragon, Gold (MM, MC1)
Dragon, Gray (D#183, MCA1)
Dragon, Green (MM, MC1)
Dragon, Greyhawk (MC5)
Dragon, Jacinth (MCA1)
Dragon, Jade (MCA1)
Dragon, Jade [Mystaran] (MCM)
Dragon, Kodragon (MC4)
Dragon, Land (D#182, MCA1)
Dragon, Li Lung (MC3)
Dragon, Lung Wang (MC3)
Dragon, Mercury (MM, FOR1)
Dragon, Midgard (D#183, MCA1)
Dragon, Mist (MM, MC5)
Dragon, Mithril (SJR4)
Dragon, Moon (MC9)
Dragon, Onyx (MCM)
Dragon, Pan Lung (MC3)
Dragon, Pearl (MCA1)
Dragon, Radiant (SJ)
Dragon, Rain [Maztican] (FMA1)
Dragon, Rain [Norse] (D#183, MCA1)
Dragon, Red (MM, MC1)
Dragon, Ruby (MCM )
Dragon, Rust (PoL)
Dragon, Sapphire (MM, MC14)
Dragon, Sea (MC4)
Dragon, Sea [Norse] (D#182, MCA1)
Dragon, Shadow (MM, MC5)
Dragon, Shen Lung (MC3)
Dragon, Silver (MM, MC1)
Dragon, Steel (MM, FOR1)
Dragon, Stellar (MC9)
Dragon, Sun (MC9)
Dragon, T'ien Lung (MC3)
Dragon, Topaz (MM, MC14)
Dragon, Tun Mi Lung (MC3)
Dragon, White (MM, MC1)
Dragon, Yellow (MM, FOR1)
Dragon, Yu Lung (MC3)