Green/Black Warthog?

Something I noticed when the advertisements for the Gamepass Ultimate came about that not only did we get a good look at the ‘Pass Tense’ Assault Rifle coating, but one thing the picture portrayed was the image of the Warthog the Spartan was riding. It was black and green, and even the chaingun had the telltale colors. Anyone else wonder if that might be next month’s reward? I have the Adrenal Weapons and this just compliments it perfectly.