After the long wait, it looks like TU12 is coming so near.

Minecraft Xbox 360 TU12 Update Now For Testing In Microsoft
Recently, 4J Studios said in a tweet that TU12 has already been handed over to Microsoft for testing. The good news from 4J Studios was retweeted a thousand times. This only shows that gamers are really waiting for the release of this update and they are so excited than no other. One fan of 4J Studios said he will make a video of it while others said that 4J Studios never fail to make their fans smile and the news of the TU12 handed for testing is just one of the biggest and the greatest news every gamer is waiting.

What to Expect with TU12

TU12 has a lot to offer to its players. There will be new mobs including ocelot/cat, iron golem, and baby villager coming. There will also be new items that players can enjoy in enhancing their favorite world and theme including redstone, lamp, jungle wood, stairs, jungle, wood half, slab, jungle wood block, jungle wood, planks, jungle tree, sapling, ocelot spawn and egg. There will also be chiseled stone brick on the creative mode along with mob heads like skeleton, wither skeleton, zombie, human and creeper.

Other than the new items and mobs, TU12 also have changes and additions from the previous updates. The complete list of additions and changes are listed below courtesy of (Minecraft forums):

New Tutorial World
New map height limit (256 instead of 128)
Jungle Biome
Jungle trees
Cocoa beans grow on Jungle trees
Slabs and Stairs can be placed upside-down by placing them below a block
Added Corner Stairs and upside down Corner Stairs
Added 3D dropped items
Added dispensing Boats and Minecarts to Dispenser
New ambient cave sounds
New AI for Mobs
Added rare drops for Mobs
Villagers will have children if there is room in their village
Zombie sieges will occur occasionally at night
Zombies break down doors on Hard Mode
Crafting recipe for ladder now yields 3 ladders instead of 2
Placing blocks on grass will replace it
Lava now has a faint rumbling sound effect, and large particles that hop out of the lava produce a popping sound
Very rare Desert Wells can be found in Desert biomes
Increased max boats in a world to 40
When in the Nether, Snow Golems will melt and die same as when they are in Desert biomes
Abandoned Mineshafts can generate with wooden bridges now when generated over a cave or over top another tunnel
Doors have been updated so that double doors work better with Redstone
Added a Favorites tab to the Skin Selector menu, storing most recently used skins
Added support for Texture Packs and Mash-up Packs, and display of these in the Minecraft Store.
Of course fixes are also done with TU12 to make sure that players will have the most enjoyable gaming experience possible. Below is the list of fixes done for TU12.

local player shadows not being displayed
few issues with the Privileges settings
visible seams in clouds
3rd person camera issues with water, where the underwater filter would be randomly removed
structures generating at the edge of a world
putting enchanted items in a Minecart With Chest and destroying it removes the enchantments
breaking a bow having improper animation
make Minecarts run at the correct speed
few memory leaks
issue with Can Open Containers option
issues with Can Build and Mine option
Issue with TNT blocks being triggered by explosions even with TNT explodes option off
Wolves not tilting their heads when the player has a bone in their hand
color of Potion particles status effect to match the Potion color
doors spitting in half and glitching in open/closed motion when mined
artifacts on edge of flames when in first person
a lot of game lighting issues