I was just looking at the Fotus armor and I said to myself this looks beyond the unsc arsenal and that got me thinking.
how cool would it be to have forerunner armor in halo 4 like the prometheans from halo legends. I think it would be pretty sick to run around with armor like that, so advanced and Amazing forerunner UI.
Honestly this will probably happen at some point. Maybe not in Halo 4 but at least in 5 or 6. Then again they might not simply because they would rather build a new modern design which simply incorporates Forerunner technology. The FOTUS does kind of look like a blending of Human and Forerunner design.