Ok so an update on what's going on in Hunt the Truth:
Above is a large beautiful image of what appears to be a poster for Halo 5: Guardians as part of the Hunt the Truth mini-campaign going on from the 25th-28th.
In the image we see Locke and Chief face to face in the foreground with them and their teams on the other's side. John and Blue Team are under Locke on the left and Team Locke is located under John on the right. In order from left to right we see Linda, John, Kelly and Fred. Locke's team is still up for official confirmation of its members. We see Jameson Locke next to last from the right but there on the end we see a certain Spartan IV with ODST (confirmed not to be Nightfall) helmet. He wears a combat knife on his chest and it is all but officially confirmed that this is the new Spartan IV Gunnery Sergeant Edward Buck. The Spartan in red is clearly a female and presumed to be Holly Tanaka based on her recent appearance and focus in Escalation but it is also speculated to be Macer from Nightfall. Lastly on the left for Locke's team is assumed to be Kojo "Romeo" Agu also a former ODST with Buck.
In the center of the image it is all but confirmed to be Sangheilios in the backdrop, specifically Vadam Keep - home of the Arbiter Thel Vadam. Looming over the city is possibly a Seeker but I believe it to be a Guardian Sentinel thus giving more meaning to the name "Halo 5: Guardians."
Will update with interesting things to note.