I have been looking at the new stuff coming out in 1.8.2 and I personally think they could add other things.
1. Colored/dyed slime blocks
2.Different colored wolfs for different biomes
3.Wands or spell like things
4.Giants with different skins then the regular zombie
5.Different npcs or different skins for villagers
6.Most houses having a chest in them in villages
7. Nether Dragons
8. Finally, a purpose for Ender dragon eggs

Tell me in the comment section below what you want Mojang to implement into minecraft eventually. This is my first blog, I hope you enjoyed. :D