Huge Halo 4 title update 294mb?

What did this update change? We got this today at exactly the first second of the day.

I’m going to make the assumption that it’s a patch for the Champions Bundle armor.

As mentioned, it is likely you haven’t played in a couple months have just updated your game to include the added armour and weapon skins, and armour mods that came with the Champions Bundle and the new McFarlane action figures.