https://www.polygon.com/e3/2018/6/10/17436066/halo-infinite-trailer-xbox-one-pc

Master Chief is finally returning with Halo Infinite.

The game’s debut trailer — revealed at Microsoft’s E3 press conference — showcases nature at work on a new Halo. Master Chief is shown plugging Cortana, or some kind of AI, into the back of his helmet as the final tease.