This is a question for the developers, or I suppose anyone with any concrete news on the subject: that is, will CEA have playable co-op with someone on the other side of the world?
I’ve been playing Halo since day one with a good friend of mine, and we’ve continued through each core title. A couple years back I moved across the Atlantic and we continued playing Halo 3 and now Reach. We had no problem playing Halo 3’s campaign despite being 8 timezones away - Reach, however, is unplayable in co-op or Firefight modes, all other elements being equal (actually, not so - we’re now only five time zones apart, and both of our internet connection speeds have been significantly increased - mine by over an order of magnitude).
I know it can be done, so the question is, simply: will CEA’s engine/netcode inherently lag in co-op or not?