Master Chief Svalinn Mk. I

So my imagination of Halo starting with small changes as early as Reach and larger ones as you go. One such alteration is the start of a 5th spartan program similar to that of the 2nd. They were originally planned to be a 4th generation and most were either volunteer children like the 3s or born specifically to become spartans. However, the 4th generation came around and was announced well before ONI could finish even the first class of Spartan 5s. To coincide with the Spartan 5 program they created the Svalinn Armor System. It was far more advanced than the Gen2 system and allowed for AIs by default. The armor was based upon both John's Gen2 equipment and several Forerunner technologies. John after events on Argent Moon was re-stationed, along with blue team, on a secret base on Tribute. There they finished training the Spartan 5s along with a team of Spartan 4s and some spartans of Gamma Company. The Spartan 5s as wells as any remaining Spartan 2s were equipped with the new Svalinn system. The armor is capable of cloaking, carrying a Forerunner Ai, and most importantly has the strongest, lightest, fastest, and most customizability of any UNSC fielded armors. John's new personal AI became Exuberant Witness after he escaped the custody of Locke and fled from Genesis with the rest of Blue Team.