There is obviously a ton of theories and ideas going around the web about where chief is, why he’s there, and the most prevalent question for some reason is why he is cloaked while in his armor. I’ll be honest, some theories just don’t make a lot of sense, and so i decided to give mine. Okay, here it goes.
First off, where is he? I believe Master Chief is on The Ark. Although it was destroyed at the end of Halo 3, that doesn’t exactly mean it’s totally gone.In the trailer, the area where chief was looked pretty destroyed. Let’s rewind back to Halo CE. When mater chief landed on the Halo ring, it goes through a lot of different weather changes. Cortana then explains how the ring experiences these weather outburts. Since The Ark was ‘destroyed’, that must’ve caused the weather to freak out and result in a brutal sandstorm. Now, onto the meat of the trailer. That giant thing the comes out of the ground, i believe, is a Forerunner named “Mendicant Bias”. My reason to believe this is simple. But first, some background on Mendicant Bias. Mendicant Bias was created in 10,043 BCE by The Didact and The Master Builder. He was charged with organizing Forerunner defense against the Flood before his defection to the gravemind, but he eventually caused him to turn rampant intentionally and turn against his creators. He used 5 of the 12 Halos to attack the Forerunners, (hence why there is now only 7) and the 7 remaining went to the ark. During the events of Halo 3, Mendicant Bias was brought through a was charged with organizing Forerunner defense against theoi portal to Instillation 00 (The Ark) and burried. However, he would speak with Chief through the terminals. For example,
<mark>“And so here at the end of my life, I do once again betray a former master. The path ahead is fraught with peril. But I will do all I can to keep it stable - keep you safe. I’m not so foolish to think this will absolve me of my sins. One life hardly balances billions. But I would have my masters know that I have changed. And you shall be my example.”</mark>
I believe that master chief is on the ark, and he is searching for Mendicant Bias, awaken him, and ‘team up’ to try and
1.)find Cortana
2.)Make sure there are no other Forerunner threats out there.
Upon researching why he would have a cloak on, i believe The Master Chief is struggling with his humanity after the ending of Halo 4, and feels lonely and wants to live in silence, and almost ‘go into hiding’. He is ashamed of what happened and believes it was his fault, considering it WAS since he activated the pillars that awakened the Didact.
This is all my opinion, besides the background knowledge of Mendicant Bias. Please pardon my spelling and or grammar mistakes.