Notch has mentioned new mobs.
Vote for your favorite.
Giants: Massive Zombies
Dragons: Notch hinted during the Spider-riding skeleton update that he will add Dragons to the game. Dragons may also be able to fly or breathe fire. Notch confirmed in his Twitter that he will definitely add a form of flying transportation. There is a chance that Dragons may be able to be ridden in a similar manner to pigs.
Village Mobs: Living Pigmen, etc. Notch once mentioned having goblin settlements living in NPC Villages.
Bats:Notch briefly mentioned coding bats, not much has been mentioned about them since.
Wolves: Notch has stated that wolves are going to be a definite addition
Whales:Whales have recently been confirmed as a sea mob, although their purpose hasn't been specified.
Sea Monsters: On July 21st, 2010, Notch commented via Minecast that Sea Monsters are a possibility. He particularly noted the possibility of sharks.
Boss Mobs: There is a possibility of boss monsters for the players to slay
Mimics: Notch commented via Minecast that mimics may be a possibility.
Prefix Mobs: Notch confirmed during the Brocraft.net stream that he will be adding 'prefix mobs'. This meaning that there will be mobs such as 'Burning Spider' 'Giant Zombie' 'Cobble Creeper' and etc. It's unknown how many prefixes there will be
Vote for your favorite.
Giants: Massive Zombies
Dragons: Notch hinted during the Spider-riding skeleton update that he will add Dragons to the game. Dragons may also be able to fly or breathe fire. Notch confirmed in his Twitter that he will definitely add a form of flying transportation. There is a chance that Dragons may be able to be ridden in a similar manner to pigs.
Village Mobs: Living Pigmen, etc. Notch once mentioned having goblin settlements living in NPC Villages.
Bats:Notch briefly mentioned coding bats, not much has been mentioned about them since.
Wolves: Notch has stated that wolves are going to be a definite addition
Whales:Whales have recently been confirmed as a sea mob, although their purpose hasn't been specified.
Sea Monsters: On July 21st, 2010, Notch commented via Minecast that Sea Monsters are a possibility. He particularly noted the possibility of sharks.
Boss Mobs: There is a possibility of boss monsters for the players to slay
Mimics: Notch commented via Minecast that mimics may be a possibility.
Prefix Mobs: Notch confirmed during the Brocraft.net stream that he will be adding 'prefix mobs'. This meaning that there will be mobs such as 'Burning Spider' 'Giant Zombie' 'Cobble Creeper' and etc. It's unknown how many prefixes there will be