From whatching the halo 5/Halo 2A trailer I saw a few things. Chief is looking halo 3ish. The new Spartan might be wereing raider or warrior armor. The arbiter might be talking. The new spartan does not trust/like chief. those are my theories.
The Chief is wearing his armour from Halo 2, which is basically the exact same armour as in Halo 3, with a few minor cosmetic detail changes (such as the hands and feet).
Agent Locke is wearing a completely new set of armour, it is neither Raider or Warrior. It’s a nice-looking suit though, I’ll admit.
The Arbiter is most definitely talking. We even see him in the trailer.
Why would Locke not like nor trust the Chief? He’s looking for him, after all, and not to do anything bad to him.
> The Chief is wearing his armour from Halo 2, which is basically the exact same armour as in Halo 3, with a few minor cosmetic detail changes (such as the hands and feet).
>
> Agent Locke is wearing a completely new set of armour, it is neither Raider or Warrior. It’s a nice-looking suit though, I’ll admit.
>
> The Arbiter is most definitely talking. We even see him in the trailer.
>
> <mark>Why would Locke not like nor trust the Chief? He’s looking for him, after all, and not to do anything bad to him.</mark>
This. It never says anything about Locke not trusting Chief. The only trust issues are Arbiter not trusting Locke.