Rare just revealed they collaborated with 343i to bring Halo themed livery for their ships in Sea of Thieves. What about giving back some love to the Sea of Thieves community by putting some skins in Halo 5? Just a small idea. Maybe you could do some pirate challenges or objectives to earn the skins.
I would like to see the Sea of Thieves skull on a weapon skin, or a couple of crossed cutlasses.