He really was. I didn't mind so much that we never fought him face-to-face, but to relegate him solely to the "moments" was ridiculous. His presence was more than made up for in Human Weakness and The Forerunner Saga, thankfully.

With that picture Arteen included, it should be noted that everything we see in Origins isn't cold, hard fact but rather suggestive. It alludes to events and places that have occurred or will in abstract ways. I kinda hope that this is one exception because Guardian Forest sounds like such a neato level.