Please read the pinned post on creating new biomes and dimensions. Remember that individual items, mobs, and structures should still go in their own categories - this is not a category for entire updates.

Vote for an existing idea or New post

10votes
Void Cave
11votes
Rock lands
8votes
Lush Savanna
49votes
Horizontal Nether Portals
9votes
Kiwi Fruit Forests
16votes
Ice Floes!
11votes
Flower Desert
34votes
14votes
A counterpart to the nether
21votes
New nether biome: Molten Depths
4votes
The rich dimension
39votes
Hot water.
21votes
The Abyss
7votes
Abandoned Lab
12votes
Moist Caverns
27votes
Scarred Plains
21votes
Green Fire/ the nether's core biome
18votes
Ender Swamp
41votes
Ash Geyser Biome
18votes
Weeping Forest
16votes
Wistman's Wood forest
50votes
Atoll Biome
11votes
(Nether) Horrid Grottoes!
23votes
Nether Labyrinth Biome
135votes
(Nether update) Thermal vents
13votes
Nether update: obsidian valley
10votes
Dimension Idea: Creeper Origin Test World
56votes
The Blazing Desert (Nether Biome)