Easter Eggs in Halo 5?

Apart from a few witty lines about some crates and the RvB dialogue in Spartan Ops, there wasn’t much in the way of easter eggs in Halo 4.

This was a disappointment as CE, 2, 3, Reach, and ODST was rife with little tidbits of the developer’s humor and inside jokes. I mostly just attribute that to Bungie.

But on my first relatively paced playthrough, I didn’t see much in Halo 5’s campaign. I was really hoping to find something better than a singing grunt and Buck’s witty banter.

Perhaps I didn’t look hard enough.

Did anybody see or hear anything worth noting? It doesn’t have to be funny things, just some neat little instances that aren’t part of the collectibles and skull searching.