It looks like a Halo “Mash-Up” pack is headed to Minecraft for Xbox. The Halo Waypont twitter account posted a tweet announcing it earlier today.
An in-game screenshot was included in the tweet showing a Master Chief skinned player holding a Needler, standing in front of some Halo themed blocks. And in the background a Halo ring can be seen in the sky.
There is no release date yet and no further details have been given at this time. Head of Xbox, Phil Spencer did recently confirmed that a release date for Minecraft: Xbox One is close to being finalized. Xbox 360 saves will transfer to Xbox One, but no word on mash-up packs and other features.