[b][u]Option 1:[/b][/u] A simple port of the [b]campaign only[/b]. This means no graphical enhancements. You're basically playing Halo 2's single player on Xbox or Vista on Xbox One. No graphical enhancements whatsoever. [b][u]Option 2:[/b][/u] A simple port of the entire game, campaign and all. This means that it would basically be Halo 2, the full game, ported to Xbox One, with, again, no graphical enhancements whatsoever. [b][u]Option 3:[/b][/u] Halo 2's campaign only, but with graphical enhancements. It would be exactly like H:CEA: a graphically-enhanced, HD campaign. [b][u]Option 4:[/b][/u] A graphically-redone Halo 2. The full game, MP and all, graphically enhanced. No "under the hood" changes. Pretty much H:CEA, but with MP and every other feature originally with Halo 2. [b][u]Option 5:[/b][/u] A graphically-redone Halo 2, the full game, with [u]minor[/u] "under the hood" internal changes. Basically, it would be the exact same game, but with some internal changes so 343i could do things like disable/change certain bugs/glitches that were notorious in Halo 2. This is nothing like H:CEA, since changes, even if very minor, would be made to the original game. [spoiler]Before I continue, I should note that the above is the most likely, as Frankie already said that IF a H2A existed, changes would be made to disable the notorious gitches.[/spoiler] [b][u]Option 6:[/u][/b] A completely redone Halo 2. This would mean not only graphical updates, but updates to many different internal [b]and[/b] external game workings. This may include "finishing" the campaign, or adding additional features such as more in-depth player service records, a new or altered ranking system, Forge mode, etc. This is the least likely to receive the "classic mode." Finally... [b][u]Option 7:[/b][/u] No Halo 2 Anniversary at all. Do [u][b]not[/b][/u] check this option if you still believe that some sort of "Master Chief Collection" will release, as that would more likely be #1 or #2. At the very least it would be #1.