Minecon 2019 Summary

As beautifully summarized by @theutltl

So there's gonna be a Realms Plus feature with more marketplace content.

The mountains won so there's gonna be goats, snowier snow, and different mountain terrain.

 

The nether is getting an update with 2 new mobs and 2 (3 including variants) new biomes.

The 2 mobs are the Piglins, and the Piglin beast. (Names undetermined, you can suggest one or vote for one somewhere on the internet)

The piglins are hostile towards players, piglin beasts, and wither skeletons. The natural structure they live in is called bastions. If you wear gold armor they will be neutral to you unless you search their chests. You will be able to trade with them with gold but unlike villagers.

The piglin beast is a hostile mob that drops food to eat.

The soulsand valley has blue fog, blue fire, and fossils everywhere

The nether wart forest has 2 variants blue, or red. They have a new type of tree, swirling particles, and a dense atmosphere.

There's a new target block that releases a stronger Redstone signal the closer you get to the center.

There's a new honey block that decreases your jump hight (A lot) when you step on it and you can slide down it.

They're also releasing a new board game, talking about Minecraft dungeons and earth, but I won't bore you with even more info.