No, not a tie in to Prometheus.

And technically, they and the Forerunner proper predate Greeks.
Quote Originally Posted by Hotrod View Post
Prometheans = Forerunners.
The Prometheans shown thus far have seemed synthetic. If they're just creations like Engineers (or Sentinels really), then I wouldn't really classify them as actual Forerunners, even if some "Halo" book penned by that horrible, horrible Bear douche claims it to be so.