Honestly I think it would have Halo 2 MP on XB One. Reasoning is, they wouldn't be able to use Halo 4's multiplayer for it unless they just straight ported that to XBO, and why do that when you just do it with Halo 2's MP instead since you're already moving the campaign over. No backwards compatibility = no Halo 4 MP. If this rumor is true, definitely getting an XBO though.
Halo 2 Anni Xbox One Console Bundle :saucey: