Alright let's get the theories going!
So, assuming this trailer is to be indicative of anything from this game and its environment, where do you think the Chief is at? I started to think the Ark (I'm not convinced that the Ark got destroyed), but then there was this feeling of Installation 07. Or maybe, gasp, Reach? Or just some random glassed planet or some new world, but I really like the implications of the Ark/Installation 07/Reach better for a possible story and where it could go. Speculate away!