This is getting interesting. I reckon Forerunners will look like humans. But slightly taller. And freakishly smart. Also, I reckon there will be another Halo game after Reach - whether it's made by Bungie or 343 Industries - cos the end of Halo 3 is an epiczorz cliffhanger.
Well, the Chief didn't activate it, the Arbiter did. The Forerunners built this one so everyone could use it, I guess. Maybe some species had six fingers.
The new episode of Halo Legends shows them. Cortana is explaining the memories of the forerunners she has whilst off adventuring in space. The Forerunners aren't actually showed, as they all wear full body Combat Suits, but they have a tall and skinny build. Really weird guns. Literally a handle, some little metal things, and lasers that fire out like whips. Look them up or watch the new episode on Waypoint this Saturday. Picz http://halo.wikia.com/wiki/File:Forerunner_Meeting.jpg ^^Meetings http://halo.wikia.com/wiki/File:Forerunner_weapon.jpg ^^Weird Guns http://halo.wikia.com/wiki/File:Forerunner_origins.jpg ^^Combat Armor
Some of those pictures look freakishly similar to the "faces" found in this video. YouTube - Sandbox Easter Egg-Guardian Tower Faces
That wasnt what I was hoping to see, I wanted to see their faces >.< It was pretty underwhelming TBH. Well we can tell they are humanoid. Im not sure what those 7 were planning on doing when fighting the flood on foot. I just wish we could see them ingame, maybe in Reach but I'm not sure how
I think they look less futuristic than people think, Imagine them as spirit people instead of mecca builders.