If it's the one that was just linked above me, that's the nameplate you get for playing Halo Wars: Definitive Edition, I think. It's a picture of Omega Team from the end of this trailer.
Marine - Iron
Made your first hot drop into HaloWaypoint.com
Halo 5: Guardians MP Beta participant.
View your Service Record on the web.
Become a member of an active Spartan Company.