New rainforest Biome!

What if we add in a tropical rainforest biome, with new mobs such as tigers, leopards, tropical birds and piranhas! This biome will be wet and filled with trees, rivers and streams! There also could be new village types and crops! I imagine corn and huts for houses. There could be new enchants, weapons and buildings! Maybe a battle axe or a battle horn that gives buffs!