Title Update 8 for Minecraft: Xbox 360 Edition will be arriving tomorrow. 4J Studios, the developer of the console version of Minecraft, confirmed the lengthy update will begin rolling out on Wednesday, January 30, at "around" 10am UK time.
They warned it could take some time before it becomes available worldwide. Unfortunately, that's about as specific as their update goes.
Earlier this week, 4J's Paddy Burns revealed the contents of the hefty update. You can find the full list of changes and fixes incoming here.