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

23votes
Nether Biome: Foul Bog
35votes
New dimension. Thule.
18votes
Infested Forest [New Nether Biome]
23votes
Nether Labyrinth Biome
15votes
38votes
Rare Nether Biome: Greed Islands
3votes
A new biome titled Rainbow Mystery
12votes
Sub Nether
13votes
9votes
Nether Tentacle
23votes
Endergreen Forrest
32votes
Magic Mountains
15votes
Gravel desert biome for the Nether
28votes
Nether Peaks [New Biome]
7votes
Carboniferous Layer
8votes
Underground Water Oceans in the Nether!
19votes
4votes
3rd Chain of Islands Past End Cities
10votes
Dimension Idea: Creeper Origin Test World
19votes
Redstone Dimension
9votes
The Negaworld (dimension)
29votes
Crying Valley Biome
13votes
nether bamboo forest
39votes
End Biome: Purpur Stone Biome
20votes
Lakebed biome
11votes
World and Over, A new dimension.