Dice answered some questions about Back to Karkand and the Physical Warfare Pack.

Here's a snippet:

Q: Is the Physical Warfare Pack available in all regions, or just in the UK?
A: It will be available worldwide at select retailers. It was first announced in the UK. Exact details for other countries and retailers will be announced at a later date.

Q: Will Physical Warfare Pack imbalance the game?
A: The three exclusive items in the Physical Warfare Pack were specifically chosen not to be overpowered or imbalance or break the game in any way.

Q: Why do I want the Physical Warfare Pack?
A: Owning these items will give you a more varied arsenal, but it will not give you a significant advantage on the battlefield.

Q: Is the Back to Karkand expansion pack exclusive to pre-orders?
A: No. You can also buy it separately if you do not pre-order Battlefield 3. Back to Karkand will be available the exact same date after the launch of Battlefield 3 no matter if you pre-ordered or buy it separately.

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