I’m disappointed to find out that a cool looking promethean weapon teased in the Return of the Forerunners video is not actually included in the game 
7:05 http://www.youtube.com/watch?v=55zOTemj03k&feature=relmfu
Unfortunately I missed the text in the top right corner
I think it was just an old Scattershot concept.
> I think it was just an old Scattershot concept.
This more than likely.
I don’t know why everyone thought this weapon was going to be in. It says on the top right “Proof of Concept”. It overheated (which no Promethean weapon does) and there was Reach’s HUD.
> I think it was just an old Scattershot concept.
they did say that they made over 200+ pictures before taking out the ones that they liked.