Well, let's look at what actually exists in the MM that's not a dragon and is bigger than Huge size
Gargantuan
Animated Object
Baleen Whale
Cachalot Whale
Krarken
Monstrous Centipede
Monstrous Scorpion
Monstrous Spider
Nightcrawler
Elder Black Pudding
Purple Worm
Roc
Colossal
Animated Object
Monstrous Centipede
Monstrous Scorpion
Monstrous Spider
Tarrasque
Who'd actually want to see proper minis of animated objects, whales, or the various monstrous vermin? (Well, for some of those you can just go out and buy appropriately sized plastic toys.) That leaves us with the Kraken, the Nightcrawler, an Elder Black Pudding (ooo, big pile of blackberry jello!), the true-sized purple worm, the roc (big eagle), and the Tarrasque. That's not a whole lot of must-buys there, if you ask me.
Gargantuan
Animated Object
Baleen Whale
Cachalot Whale
Krarken
Monstrous Centipede
Monstrous Scorpion
Monstrous Spider
Nightcrawler
Elder Black Pudding
Purple Worm
Roc
Colossal
Animated Object
Monstrous Centipede
Monstrous Scorpion
Monstrous Spider
Tarrasque
Who'd actually want to see proper minis of animated objects, whales, or the various monstrous vermin? (Well, for some of those you can just go out and buy appropriately sized plastic toys.) That leaves us with the Kraken, the Nightcrawler, an Elder Black Pudding (ooo, big pile of blackberry jello!), the true-sized purple worm, the roc (big eagle), and the Tarrasque. That's not a whole lot of must-buys there, if you ask me.