Some thoughts: Obviously this will not register as a separate game or MS would be splitting the community. I believe most of the extras will ship via download codes. So everything will be compatible with everything and you could sell any extra codes you have. I want to know if Spartan Ops will now be playable offline via split-screen and System Link. Why would they advertise it including the full Season 1 of Spartan Ops like that? Potentially a patch for all versions of Halo 4?
And one last question. With MS saying the 360 has 2-3 years left in it, does that mean 360 will not only get Halo 2 Anniversary, but a version of Halo 5 as well?