No chance of halo 5 being a launch title unless they want to let sony be the only next gen on the market for a year and a half. Which they wont.
And they already said 4 would have multiple seasons.
Last I heard is that they were waiting to see how well received Season 1 was. If they announced a Season 2, please give me the link. --- GT: Dethrow2112//PSN: DuodecimKnight//PKMN Black2 FC: 2280 6133 3461