In the minecon 2019 was announced the new biggest update, the Nether Update, with that, his new biomes, mobs, blocks and more. They said that there is more biomes than what they showed, AND THAT'S WHY I CAME HERE!!
Here it is:
As well you know, there exists the Wither Rose, made by the murdered souls of the Wither, and what if there would be vegetation of Wither? Would exist the Wither Forest, similar to the Petrified Forests, the vegetation of here would hurt you and, of course, there would be wither skeletons and a possible new mob called Wither Skeleton Horse.
Lava Lake: Beside of the name, would have waterfalls of lava (or LAVAfalls? please kill me) with a new block called Lava Gravel.
Swampy Wart: A swamp of Nether wart.
Nether Sky: The nether is a gigant cave, no? Well, the Nether Sky is the surface of the Nether (yeah, would replace the surface of bedrock) of course, should have high mountains, but I will talk of that later. Would have a new type of netherrack called "Nethernite" just because we need it! And maybe a Nether Phantom?
Sulfur Cave: A cave based on a new block, Sulfur, but just block of dust sulfur or something like that. This cave would seperate the Nether, with the Nether Sky but also you can find it in his mountains, it might sound silly, but this cave is very important for something, but that's is for another post. When you broke the Sulfur, you'll get Sulfur Dust and if you cook that in the furnace, the result is a new item, Glazed Sulfur, with that, you can craft a Sulfur Glass (the Sulfur Glass is the important part).
Dusty Mountain: The mountains of the Nether Sky, would have bone meal in form of snow.
Well, that is, maybe in another occasion I can make a post explaining every biome with more details. Soon, a post of new mobs. Don't kill yourself and goodbye!