New (mini) Bosses
Here you can see 3 new (mini) bosses there are going to be a lot more
Nether OverHaul
it's the nether but than better
New Biomes
Here are 9 new biomes
New Caves
They are Structures
New Blocks
There are new blocks
better cave decorations
here you can see most of the decorated caves
Spikes
Here you can see all of the spikes used to decorate caves