The two FPS juggernauts, Modern Warfare 3 and Battlefield 3 will generate over $1.4 Billion in revenue in the 4th quarter of 2011 analysts predict. This is 15% of total packaged videogame software sales in Q4.

The analysts also predict that Modern Warfare 3 will have 16 million copies sold worldwide this year... with Battlefield 3 only receiving half, with 8 million copies sold globally.

Activision and EA have both spent an astonishing amount on marketing these two behemoths, with each publisher spending over $100 million trying to sell these two products.

However the analysts also feel that many gamers will end up buying both games, saying:

"“I’d guess that around half of the console copies of Battlefield 3 will be bought by people who also buy Modern Warfare 3, so around 2 to 3 million will buy both."

Modern Warfare 3 will be released on November 8th and Battlefield 3 will be released on October 25th.

Source BF wiki blog