The Pre order bonus for Halo 4 has been revealed.
It depends where you order it from is what the pre order bonus is


UK Retailer: GAME Gives you: Oceanic Armor skin and Arctic Battle Rifle skin as a pre order bonus
Amazon (U.S.A. and France) Gives you: Web Armor skin, A Bullet proof emblem and a Spartan Emblem as a pre order bonus
Play.com Gives you: Dead Eye helmet skin as a pre order bonus
Mighty Ape Gives you: Raptor Armor Skin, Pulse Armor skin, Locus Helmet, and 2 unknown emblems
EB Games (Canada) Gives you: Arctic battle rifle skin and Forest armor skin
Best Buy Gives you: Raptor Armor Skin
Microsoft Gives you: $25 off your next purchase and Pulse weapon skin