This question was closed as off-topic:
Does the AC 3 pre-order collector editions lack content available with the special edition
Two reasons for that were mentioned in the comments, and I absolutely disagree with both.
1) The "shopping advice" argument
The question is asking for comparing content between different editions of the same game. This is 100% objective - a dry list such as "this module is included, but that module isn't". There's no element of advice or recommendation in this question. The question is even explicit about what the OP is looking for - an edition containing all the different modules.
Further, we have many edition-comparison questions:
- What is the difference between borderlands and borderlands GOTY edition?
- What features does Rock Band 3 for Wii lack?
- Which versions of Final Fantasy VI include multiplayer battle support?
- Is there a functional difference between the console and PC versions of the LEGO games?
- Civilization V versions
- ... and more
And I consider all to be good questions - fitting to Q&A, objective, helpful for many people, relevant for gamers, etc.
2) Unreleased game
The various editions of the games are available for pre-ordering, as in now. This isn't asking about gameplay questions or technical support questions or anything like that, it's instead asking about what we could say is a "released" aspect of the game - the various editions.
So while this could be argued to be about an unreleased game and thus everything can still change, I personally think this sort of information is extremely useful right now and will probably continue to be useful after the game is released, so I don't think closing it is the right thing to do. Also, considering there are already box art versions and pre-ordering payments, this will probably not change.