cosmetic dlc and a tons of it. quick and easy make (compared to map dlc) and "cheap to sell" a dollar here for an armor skin, a dollar here for a firefight/Mp Voice set, Hero weapons (weapon re-skins) a shiny avatar and/or nameplate. or it's gonna be Spartan Ops analogy we would pay for. Legacy firefight maps(levels based on areas or certain fights from previous games). forge and theater are not pay wall items. forge has never been one and even when we got a proper halo 4 canvas (forge island) that was also free. theater being what is (a legacy mode from pre-dvr days) cant really be charged extra for. typical micro transactions for free to play games without any of the pay to win stuff. which would be hard to do cause the progression system by the vary nature halo 5 will be at worst just the reach style(points earned in game spent on cosmetics) or at best the mcc style (everything tied directly to campaign) that being said i think there will be a fair amount of cosmetics in game natively(all of halo 4's cosmetics)