The first details of FIFA 12 have been released, after Official PlayStation Magazine in France got to speak to the developers working on the title.
Along with general balancing tweaks, the game will feature a few details. One such addition is 'Impact Zone', which will allow players to make contact with each other in various ways. Now, how players interact will be properly formulated. They also talked about the 'AI Vision Game', which will make passing more realistic. If you try to complete a pass where the player is within visible range, it is more likely to complete. It also means that if you try blind passes, like passes to someone behind you, they will be less accurate.
EA Sports will also be amending the injury system. You will now be able to get injured without any contact from the opposition. If you use players too much in a match, they will get tired and become injury prone.
Source: FIFA Soccer Blog